diff --git a/repos/base-foc/run/cap_integrity.run b/repos/base-foc/run/cap_integrity.run
index 17a2653b3..805841562 100644
--- a/repos/base-foc/run/cap_integrity.run
+++ b/repos/base-foc/run/cap_integrity.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-cap_integrity"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 # increase expect buffer size, since there might be many log messages
 match_max -d 100000
diff --git a/repos/base-hw/run/cpu_scheduler.run b/repos/base-hw/run/cpu_scheduler.run
index 75e458b15..454635c8d 100644
--- a/repos/base-hw/run/cpu_scheduler.run
+++ b/repos/base-hw/run/cpu_scheduler.run
@@ -33,7 +33,7 @@ install_config {
 build_boot_image "core ld.lib.so init test-cpu_scheduler"
 
 # configure qemu to use 64 MB RAM and avoid GUI mode
-append qemu_args " -m 64 -nographic"
+append qemu_args "  -nographic"
 
 # execute the test in qemu if the targeted platform is supported
 run_genode_until "done.*\n" 10
diff --git a/repos/base-hw/run/double_list.run b/repos/base-hw/run/double_list.run
index 59665e850..e47fc27a6 100644
--- a/repos/base-hw/run/double_list.run
+++ b/repos/base-hw/run/double_list.run
@@ -30,7 +30,7 @@ install_config {
 build_boot_image "core ld.lib.so init test-double_list"
 
 # configure qemu to use 64 MB RAM and avoid GUI mode
-append qemu_args " -m 64 -nographic"
+append qemu_args "  -nographic"
 
 # execute the test in qemu if the targeted platform is supported
 run_genode_until "done.*\n" 10
diff --git a/repos/base-nova/run/platform.run b/repos/base-nova/run/platform.run
index ae9869bde..c81683b57 100644
--- a/repos/base-nova/run/platform.run
+++ b/repos/base-nova/run/platform.run
@@ -35,7 +35,7 @@ install_config $config
 
 build_boot_image "core ld.lib.so init test-platform"
 
-append qemu_args "-nographic -m 192 -smp 2"
+append qemu_args "-nographic  -smp 2"
 
 run_genode_until {Test finished} 200
 
diff --git a/repos/base-okl4/run/priority.run b/repos/base-okl4/run/priority.run
index 81b479472..7728bcee6 100644
--- a/repos/base-okl4/run/priority.run
+++ b/repos/base-okl4/run/priority.run
@@ -8,7 +8,7 @@ install_config "[exec cat [genode_dir]/repos/os/src/init/config.priority]"
 
 build_boot_image "core ld.lib.so init"
 
-append qemu_args "-nographic -m 256"
+append qemu_args "-nographic "
 
 # run genode until the init->init.2 process gives us a life sign
 run_genode_until "init.2.*No children to start.*\n" 100
diff --git a/repos/base/run/ada.run b/repos/base/run/ada.run
index 9bc00dd69..2d3559b75 100644
--- a/repos/base/run/ada.run
+++ b/repos/base/run/ada.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-ada"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {child "test-ada" exited with exit value 0.*} 10
 
diff --git a/repos/base/run/affinity.run b/repos/base/run/affinity.run
index 306abac83..ef2b25248 100644
--- a/repos/base/run/affinity.run
+++ b/repos/base/run/affinity.run
@@ -65,7 +65,7 @@ if {[have_include "power_on/qemu"]} {
 	set want_cpus_y 1
 	set want_cpus_total [expr $want_cpus_x*$want_cpus_y]
 	set rounds "03"
-	append qemu_args "-nographic -m 64 -smp $want_cpus_total,cores=$want_cpus_total "
+	append qemu_args "-nographic  -smp $want_cpus_total,cores=$want_cpus_total "
 } else {
 	set rounds "10"
 	if {[have_spec x86]} { set rounds "40" }
diff --git a/repos/base/run/affinity_subspace.run b/repos/base/run/affinity_subspace.run
index aafd4c5eb..f35b4d2f6 100644
--- a/repos/base/run/affinity_subspace.run
+++ b/repos/base/run/affinity_subspace.run
@@ -50,7 +50,7 @@ install_config {
 	</config>
 }
 
-append qemu_args " -nographic -m 64 -smp 8,cores=8 "
+append qemu_args " -nographic  -smp 8,cores=8 "
 
 build_boot_image "core init test-affinity"
 
diff --git a/repos/base/run/ds_ownership.run b/repos/base/run/ds_ownership.run
index 244ce77c7..c8dcaa813 100644
--- a/repos/base/run/ds_ownership.run
+++ b/repos/base/run/ds_ownership.run
@@ -33,7 +33,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-ds_ownership"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*test succeeded.*\n} 10
 
diff --git a/repos/base/run/fpu.run b/repos/base/run/fpu.run
index 29433c9eb..9fd6d2dd1 100644
--- a/repos/base/run/fpu.run
+++ b/repos/base/run/fpu.run
@@ -37,7 +37,7 @@ build_boot_image "core ld.lib.so init test-fpu"
 # Execution
 #
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "test done.*\n" 60
 
diff --git a/repos/base/run/log.run b/repos/base/run/log.run
index 87acbe289..7adc0251f 100644
--- a/repos/base/run/log.run
+++ b/repos/base/run/log.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-log"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "Test done.*\n" 10
 
diff --git a/repos/base/run/mp_server.run b/repos/base/run/mp_server.run
index 0210ad837..4e1ddcc49 100644
--- a/repos/base/run/mp_server.run
+++ b/repos/base/run/mp_server.run
@@ -45,7 +45,7 @@ if {[have_include "power_on/qemu"]} {
 	if {[have_spec zynq]}                       { set want_cpus 1 }
 	if {[have_spec sel4]}                       { set want_cpus 1 }
 
-	append qemu_args " -nographic -m 64 -smp $want_cpus,cores=$want_cpus "
+	append qemu_args " -nographic  -smp $want_cpus,cores=$want_cpus "
 }
 
 # run the test
diff --git a/repos/base/run/new_delete.run b/repos/base/run/new_delete.run
index d582c854e..95607ae88 100644
--- a/repos/base/run/new_delete.run
+++ b/repos/base/run/new_delete.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-new_delete"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "Test done.*\n" 15
 
diff --git a/repos/base/run/reconstructible.run b/repos/base/run/reconstructible.run
index 765d3ac86..e51e26fe1 100644
--- a/repos/base/run/reconstructible.run
+++ b/repos/base/run/reconstructible.run
@@ -24,7 +24,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-reconstructible"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- Reconstructible utility test finished ---.*\n} 10
 
diff --git a/repos/base/run/rm_fault.run b/repos/base/run/rm_fault.run
index 2f1080114..3ee3e0cf0 100644
--- a/repos/base/run/rm_fault.run
+++ b/repos/base/run/rm_fault.run
@@ -26,6 +26,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-rm_fault"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {child "test-rm_fault" exited with exit value 0.*} 300
diff --git a/repos/base/run/rm_nested.run b/repos/base/run/rm_nested.run
index a67da07db..8d10e34da 100644
--- a/repos/base/run/rm_nested.run
+++ b/repos/base/run/rm_nested.run
@@ -27,6 +27,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-rm_nested"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until ".*--- finished nested region map test ---.*\n" 300
diff --git a/repos/base/run/slab.run b/repos/base/run/slab.run
index 4f7ae448f..421c9d9b9 100644
--- a/repos/base/run/slab.run
+++ b/repos/base/run/slab.run
@@ -36,7 +36,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-slab"
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until "Test done.*\n" 100
 
diff --git a/repos/base/run/sub_rm.run b/repos/base/run/sub_rm.run
index de84c3311..314034428 100644
--- a/repos/base/run/sub_rm.run
+++ b/repos/base/run/sub_rm.run
@@ -24,7 +24,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-sub_rm"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- end of sub-rm test ---.*} 10
 
diff --git a/repos/base/run/synced_interface.run b/repos/base/run/synced_interface.run
index 6690e0dd7..bb2b4c708 100644
--- a/repos/base/run/synced_interface.run
+++ b/repos/base/run/synced_interface.run
@@ -24,7 +24,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-synced_interface"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- Synced interface test finished ---.*\n} 10
 
diff --git a/repos/base/run/thread.run b/repos/base/run/thread.run
index 40625c8a0..4e84d51e4 100644
--- a/repos/base/run/thread.run
+++ b/repos/base/run/thread.run
@@ -42,7 +42,7 @@ install_config $config
 
 build_boot_image "core ld.lib.so init test-thread"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*test completed successfully.*\n} 60
 
diff --git a/repos/base/run/util_mmio.run b/repos/base/run/util_mmio.run
index 86f7e62d2..7adc28023 100644
--- a/repos/base/run/util_mmio.run
+++ b/repos/base/run/util_mmio.run
@@ -38,7 +38,7 @@ build_boot_image "core ld.lib.so init test-util_mmio"
 # Execution
 #
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "Test done.*\n" 10
 
diff --git a/repos/dde_bsd/run/audio_out.run b/repos/dde_bsd/run/audio_out.run
index 9e9cda288..6bf060663 100644
--- a/repos/dde_bsd/run/audio_out.run
+++ b/repos/dde_bsd/run/audio_out.run
@@ -126,7 +126,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 128 -nographic -soundhw es1370 "
+append qemu_args "  -nographic -soundhw es1370 "
 
 #
 # For obvious reasons the timeout depends on the total
diff --git a/repos/dde_linux/run/lxip_http_srv.run b/repos/dde_linux/run/lxip_http_srv.run
index 50995d0cb..5e89a9be7 100644
--- a/repos/dde_linux/run/lxip_http_srv.run
+++ b/repos/dde_linux/run/lxip_http_srv.run
@@ -119,7 +119,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/dde_linux/run/lxip_udp_echo.run b/repos/dde_linux/run/lxip_udp_echo.run
index 3b38c5665..5c5a95c3d 100644
--- a/repos/dde_linux/run/lxip_udp_echo.run
+++ b/repos/dde_linux/run/lxip_udp_echo.run
@@ -119,7 +119,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/dde_linux/run/usb_hid.run b/repos/dde_linux/run/usb_hid.run
index 4805e3ca8..e8d5a34fc 100644
--- a/repos/dde_linux/run/usb_hid.run
+++ b/repos/dde_linux/run/usb_hid.run
@@ -142,7 +142,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -usb  -usbdevice mouse -usbdevice keyboard"
+append qemu_args "  -usb  -usbdevice mouse -usbdevice keyboard"
 append qemu_args " -device usb-ehci,id=ehci"
 
 if { [have_include "power_on/qemu"] || ![get_cmd_switch --autopilot] } { run_genode_until forever }
diff --git a/repos/dde_linux/run/usb_net.run b/repos/dde_linux/run/usb_net.run
index 98b0f008c..120e54d91 100644
--- a/repos/dde_linux/run/usb_net.run
+++ b/repos/dde_linux/run/usb_net.run
@@ -102,7 +102,7 @@ lappend_if [have_spec gpio] boot_modules [gpio_drv]
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until forever
 
diff --git a/repos/dde_linux/run/usb_storage.run b/repos/dde_linux/run/usb_storage.run
index 90735032a..656f16838 100644
--- a/repos/dde_linux/run/usb_storage.run
+++ b/repos/dde_linux/run/usb_storage.run
@@ -108,14 +108,14 @@ catch { exec sh -c $cmd }
 #
 # Qemu opts for UHCI
 #
-#append qemu_args " -m 128 -nographic -usbdevice disk::$disk_image -boot order=d"
+#append qemu_args "  -nographic -usbdevice disk::$disk_image -boot order=d"
 
 #
 # Qemu opts for EHCI
 #
 append qemu_args "-drive if=none,id=disk,file=$disk_image"
 append qemu_args {  \
--m 128 -nographic -M pc \
+ -nographic -M pc \
 -device usb-ehci,id=ehci \
 -device usb-storage,bus=ehci.0,drive=disk \
 -boot order=d }
@@ -124,7 +124,7 @@ append qemu_args {  \
 # Qemu opts for XHCI
 #
 #append qemu_args {  \
-#-m 128 -nographic -M pc \
+# -nographic -M pc \
 #-device nec-usb-xhci,id=xhci \
 #-device usb-storage,bus=xhci.0,drive=disk \
 #-boot order=d }
diff --git a/repos/dde_linux/run/usb_terminal.run b/repos/dde_linux/run/usb_terminal.run
index aa4c9686d..d346e5573 100644
--- a/repos/dde_linux/run/usb_terminal.run
+++ b/repos/dde_linux/run/usb_terminal.run
@@ -107,7 +107,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic -usb  -usbdevice host:$usb_raw_device -nographic"
+append qemu_args "  -nographic -usb  -usbdevice host:$usb_raw_device -nographic"
 
 
 run_genode_until forever
diff --git a/repos/dde_rump/run/libc_vfs_ext2.run b/repos/dde_rump/run/libc_vfs_ext2.run
index 5305dbcf2..328fd4bd0 100644
--- a/repos/dde_rump/run/libc_vfs_ext2.run
+++ b/repos/dde_rump/run/libc_vfs_ext2.run
@@ -92,7 +92,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
diff --git a/repos/dde_rump/run/libc_vfs_fs_ext2.run b/repos/dde_rump/run/libc_vfs_fs_ext2.run
index 1a6f2cca8..2f7dad83f 100644
--- a/repos/dde_rump/run/libc_vfs_fs_ext2.run
+++ b/repos/dde_rump/run/libc_vfs_fs_ext2.run
@@ -101,7 +101,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
diff --git a/repos/dde_rump/run/rump_cgd_ext2.run b/repos/dde_rump/run/rump_cgd_ext2.run
index 5702c6559..2c825d7f2 100644
--- a/repos/dde_rump/run/rump_cgd_ext2.run
+++ b/repos/dde_rump/run/rump_cgd_ext2.run
@@ -127,7 +127,7 @@ append boot_modules "$disk_image"
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
diff --git a/repos/dde_rump/run/rump_ext2.run b/repos/dde_rump/run/rump_ext2.run
index 2cff66fbe..0865f9ecd 100644
--- a/repos/dde_rump/run/rump_ext2.run
+++ b/repos/dde_rump/run/rump_ext2.run
@@ -90,7 +90,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
diff --git a/repos/dde_rump/run/rump_fat.run b/repos/dde_rump/run/rump_fat.run
index e0a5633d4..003f3b770 100644
--- a/repos/dde_rump/run/rump_fat.run
+++ b/repos/dde_rump/run/rump_fat.run
@@ -90,7 +90,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
diff --git a/repos/dde_rump/run/rump_iso.run b/repos/dde_rump/run/rump_iso.run
index 0d4698a82..098a3efee 100644
--- a/repos/dde_rump/run/rump_iso.run
+++ b/repos/dde_rump/run/rump_iso.run
@@ -96,7 +96,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {child .* exited with exit value 0.*\n} 60
 
diff --git a/repos/gems/run/cpu_load_display.run b/repos/gems/run/cpu_load_display.run
index 579d8bdd8..3d7eff0c2 100644
--- a/repos/gems/run/cpu_load_display.run
+++ b/repos/gems/run/cpu_load_display.run
@@ -237,7 +237,6 @@ lappend_if [have_spec imx53]            boot_modules input_drv
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 append qemu_args " -smp 4,cores=4 "
 
 run_genode_until forever
diff --git a/repos/gems/run/cpu_sampler.run b/repos/gems/run/cpu_sampler.run
index cd64025d9..0e0be5129 100644
--- a/repos/gems/run/cpu_sampler.run
+++ b/repos/gems/run/cpu_sampler.run
@@ -82,7 +82,7 @@ build_boot_image {
 	test-cpu_sampler
 }
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 set match_string "Test started. func: 0x(\[0-9a-f\]+).*\n"
 
diff --git a/repos/gems/run/cpu_sampler_noux.run b/repos/gems/run/cpu_sampler_noux.run
index 77887284e..e41aa450a 100644
--- a/repos/gems/run/cpu_sampler_noux.run
+++ b/repos/gems/run/cpu_sampler_noux.run
@@ -243,9 +243,7 @@ build_boot_image $boot_modules
 
 if {[have_spec x86_64]} {
 	# bash.tar is really huge when built for x86_64
-	append qemu_args " -m 320 "
 } else {
-	append qemu_args " -m 256 "
 }
 
 if { ![get_cmd_switch --autopilot] } { run_genode_until forever }
diff --git a/repos/gems/run/decorator_stress.run b/repos/gems/run/decorator_stress.run
index d127a8816..3bd57aa82 100644
--- a/repos/gems/run/decorator_stress.run
+++ b/repos/gems/run/decorator_stress.run
@@ -98,6 +98,5 @@ build { test/decorator_stress }
 
 build_boot_image { test-decorator_stress }
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/gems/run/launcher.run b/repos/gems/run/launcher.run
index b0f838450..f1032630e 100644
--- a/repos/gems/run/launcher.run
+++ b/repos/gems/run/launcher.run
@@ -271,6 +271,5 @@ build { app/launcher test/nitpicker app/status_bar app/xray_trigger }
 
 build_boot_image { testnit launcher xray_trigger status_bar }
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/gems/run/tcp_terminal.run b/repos/gems/run/tcp_terminal.run
index 050d7738a..670409a6e 100644
--- a/repos/gems/run/tcp_terminal.run
+++ b/repos/gems/run/tcp_terminal.run
@@ -102,7 +102,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/gems/run/terminal_log.run b/repos/gems/run/terminal_log.run
index a1611c6b7..38902f506 100644
--- a/repos/gems/run/terminal_log.run
+++ b/repos/gems/run/terminal_log.run
@@ -156,5 +156,4 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 run_genode_until forever
diff --git a/repos/gems/run/terminal_mux.run b/repos/gems/run/terminal_mux.run
index 52112f194..0709ddb2b 100644
--- a/repos/gems/run/terminal_mux.run
+++ b/repos/gems/run/terminal_mux.run
@@ -148,7 +148,6 @@ set fiasco_serial_esc_arg ""
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 append qemu_args " -nographic "
 
 #
diff --git a/repos/gems/run/wm.run b/repos/gems/run/wm.run
index 815401a5d..738cb48e2 100644
--- a/repos/gems/run/wm.run
+++ b/repos/gems/run/wm.run
@@ -143,6 +143,5 @@ install_config {
 
 build_boot_image { }
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/libports/run/acpica.run b/repos/libports/run/acpica.run
index 7f6d00c0a..d9b6fddea 100644
--- a/repos/libports/run/acpica.run
+++ b/repos/libports/run/acpica.run
@@ -217,6 +217,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until {\[init -\> acpica\].*SCI IRQ:.*\n} 30
diff --git a/repos/libports/run/avplay.run b/repos/libports/run/avplay.run
index 889818c30..278227797 100644
--- a/repos/libports/run/avplay.run
+++ b/repos/libports/run/avplay.run
@@ -128,7 +128,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -soundhw es1370"
+append qemu_args "  -soundhw es1370"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/expat.run b/repos/libports/run/expat.run
index 9b29c62ff..545c64061 100644
--- a/repos/libports/run/expat.run
+++ b/repos/libports/run/expat.run
@@ -65,7 +65,7 @@ build_boot_image {
 # Execute test case
 #
 
-append qemu_args " -nographic -m 64"
+append qemu_args " -nographic "
 
 run_genode_until {.*child "test-expat" exited with exit value 0.*} 5
 
diff --git a/repos/libports/run/ldso.run b/repos/libports/run/ldso.run
index c1a526f0c..a1b059496 100644
--- a/repos/libports/run/ldso.run
+++ b/repos/libports/run/ldso.run
@@ -35,7 +35,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {child ".*" exited with exit value 123.*\n} 10
 
diff --git a/repos/libports/run/libc.run b/repos/libports/run/libc.run
index a0656f0c1..f41ce7a51 100644
--- a/repos/libports/run/libc.run
+++ b/repos/libports/run/libc.run
@@ -35,7 +35,7 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so posix.lib.so
 }
 
-append qemu_args " -nographic -m 512 "
+append qemu_args " -nographic  "
 
 run_genode_until "child .* exited with exit value 0.*\n" 10
 
diff --git a/repos/libports/run/libc_block.run b/repos/libports/run/libc_block.run
index d8c9b6940..71d4983f9 100644
--- a/repos/libports/run/libc_block.run
+++ b/repos/libports/run/libc_block.run
@@ -134,7 +134,7 @@ catch { exec sh -c $cmd }
 #
 # Qemu
 #
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 append_if $use_ahci_drv    qemu_args " -drive id=disk,file=$disk_image,format=raw,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0 -boot d"
 append_if $use_sd_card_drv qemu_args " -drive file=$disk_image,format=raw,if=sd,cache=writeback "
 
diff --git a/repos/libports/run/libc_component.run b/repos/libports/run/libc_component.run
index 82ae1afff..02911a9d6 100644
--- a/repos/libports/run/libc_component.run
+++ b/repos/libports/run/libc_component.run
@@ -92,7 +92,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 #
 # Execute test case
diff --git a/repos/libports/run/libc_counter.run b/repos/libports/run/libc_counter.run
index c8f470020..c567d6aa1 100644
--- a/repos/libports/run/libc_counter.run
+++ b/repos/libports/run/libc_counter.run
@@ -74,7 +74,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 #
 # Execute test case
diff --git a/repos/libports/run/libc_ffat_fs.run b/repos/libports/run/libc_ffat_fs.run
index fea38c418..6bab468a5 100644
--- a/repos/libports/run/libc_ffat_fs.run
+++ b/repos/libports/run/libc_ffat_fs.run
@@ -142,7 +142,7 @@ catch { exec sh -c $cmd }
 #
 # Qemu
 #
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 append_if $use_ahci_drv    qemu_args " -drive id=disk,file=$disk_image,format=raw,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0 -boot d"
 append_if $use_sd_card_drv qemu_args " -drive file=$disk_image,format=raw,if=sd,cache=writeback "
 
diff --git a/repos/libports/run/libc_filesystem_test.inc b/repos/libports/run/libc_filesystem_test.inc
index f588ec982..5e2edf1ee 100644
--- a/repos/libports/run/libc_filesystem_test.inc
+++ b/repos/libports/run/libc_filesystem_test.inc
@@ -170,7 +170,7 @@ catch { exec sh -c $cmd }
 #
 # Qemu
 #
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 append_if $use_ahci        qemu_args " -drive id=disk,file=$disk_image,format=raw,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0 -boot d"
 append_if $use_sd_card_drv qemu_args " -drive file=$disk_image,format=raw,if=sd,cache=writeback "
 
diff --git a/repos/libports/run/libc_getenv.run b/repos/libports/run/libc_getenv.run
index 6c60829e1..2fa90ac58 100644
--- a/repos/libports/run/libc_getenv.run
+++ b/repos/libports/run/libc_getenv.run
@@ -41,7 +41,7 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so posix.lib.so
 }
 
-append qemu_args " -nographic -m 64 "
+append qemu_args " -nographic  "
 
 run_genode_until "child .* exited with exit value 0.*\n" 10
 
diff --git a/repos/libports/run/libc_pipe.run b/repos/libports/run/libc_pipe.run
index 3113b3958..2bfe85747 100644
--- a/repos/libports/run/libc_pipe.run
+++ b/repos/libports/run/libc_pipe.run
@@ -35,7 +35,7 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so libc_pipe.lib.so pthread.lib.so
 }
 
-append qemu_args " -nographic -m 64 "
+append qemu_args " -nographic  "
 
 run_genode_until "child .* exited with exit value 0.*\n" 10
 
diff --git a/repos/libports/run/libc_select.run b/repos/libports/run/libc_select.run
index 613c68066..689586e1d 100644
--- a/repos/libports/run/libc_select.run
+++ b/repos/libports/run/libc_select.run
@@ -76,7 +76,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until "child \"test-libc_select\" exited with exit value 0.*\n" 120
 
diff --git a/repos/libports/run/libc_vfs.run b/repos/libports/run/libc_vfs.run
index ad27c9e80..efe72e4dd 100644
--- a/repos/libports/run/libc_vfs.run
+++ b/repos/libports/run/libc_vfs.run
@@ -68,7 +68,7 @@ build_boot_image {
 # Execute test case
 #
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
 # vi: set ft=tcl :
diff --git a/repos/libports/run/libc_vfs_block.run b/repos/libports/run/libc_vfs_block.run
index dd8ce110a..12e7d8ffa 100644
--- a/repos/libports/run/libc_vfs_block.run
+++ b/repos/libports/run/libc_vfs_block.run
@@ -83,6 +83,6 @@ build_boot_image {
 # Execute test case
 #
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 run_genode_until {.*child "test-libc_vfs_block" exited with exit value 0.*} 60
 
diff --git a/repos/libports/run/libc_vfs_component.run b/repos/libports/run/libc_vfs_component.run
index 0947909ad..8271e90c3 100644
--- a/repos/libports/run/libc_vfs_component.run
+++ b/repos/libports/run/libc_vfs_component.run
@@ -103,7 +103,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 #
 # Execute test case
diff --git a/repos/libports/run/libc_vfs_counter.run b/repos/libports/run/libc_vfs_counter.run
index 4e9b0597b..bdea12d81 100644
--- a/repos/libports/run/libc_vfs_counter.run
+++ b/repos/libports/run/libc_vfs_counter.run
@@ -86,7 +86,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 #
 # Execute test case
diff --git a/repos/libports/run/libc_vfs_fs.run b/repos/libports/run/libc_vfs_fs.run
index 83072e2a1..178f866c8 100644
--- a/repos/libports/run/libc_vfs_fs.run
+++ b/repos/libports/run/libc_vfs_fs.run
@@ -71,7 +71,7 @@ build_boot_image {
 # Execute test case
 #
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
 # vi: set ft=tcl :
diff --git a/repos/libports/run/libc_vfs_ram.run b/repos/libports/run/libc_vfs_ram.run
index 67229ddd4..2ba67674c 100644
--- a/repos/libports/run/libc_vfs_ram.run
+++ b/repos/libports/run/libc_vfs_ram.run
@@ -65,7 +65,7 @@ build_boot_image {
 # Execute test case
 #
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
 
 # vi: set ft=tcl :
diff --git a/repos/libports/run/libc_vfs_select.run b/repos/libports/run/libc_vfs_select.run
index a19c43434..561280788 100644
--- a/repos/libports/run/libc_vfs_select.run
+++ b/repos/libports/run/libc_vfs_select.run
@@ -85,7 +85,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until "child \"test-libc_select\" exited with exit value 0.*\n" 120
 
diff --git a/repos/libports/run/libc_with_libc.run b/repos/libports/run/libc_with_libc.run
index 79e9c78c3..e59281170 100644
--- a/repos/libports/run/libc_with_libc.run
+++ b/repos/libports/run/libc_with_libc.run
@@ -56,6 +56,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -nographic -m 64 "
+append qemu_args " -nographic  "
 
 run_genode_until ".*finished with_libc tests.*\n" 10
diff --git a/repos/libports/run/lwip.run b/repos/libports/run/lwip.run
index 1a7a4594b..7cd685b7b 100644
--- a/repos/libports/run/lwip.run
+++ b/repos/libports/run/lwip.run
@@ -141,7 +141,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/libports/run/moon.run b/repos/libports/run/moon.run
index bbd8f502b..8760fc224 100644
--- a/repos/libports/run/moon.run
+++ b/repos/libports/run/moon.run
@@ -41,6 +41,6 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so
 }
 
-append qemu_args " -nographic -m 65 "
+append qemu_args " -nographic "
 
 run_genode_until {.*test-moon.*Finished\..*} 40
diff --git a/repos/libports/run/nic_bridge.run b/repos/libports/run/nic_bridge.run
index 5b2335ed8..a1cdb2603 100644
--- a/repos/libports/run/nic_bridge.run
+++ b/repos/libports/run/nic_bridge.run
@@ -117,7 +117,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 512 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/libports/run/nic_bridge_lighttpd.run b/repos/libports/run/nic_bridge_lighttpd.run
index 78507634f..fd9f31429 100644
--- a/repos/libports/run/nic_bridge_lighttpd.run
+++ b/repos/libports/run/nic_bridge_lighttpd.run
@@ -156,7 +156,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 512 "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/libports/run/nic_dump.run b/repos/libports/run/nic_dump.run
index 13c979d04..256936d53 100644
--- a/repos/libports/run/nic_dump.run
+++ b/repos/libports/run/nic_dump.run
@@ -262,6 +262,6 @@ proc nic_qemu_args { } {
 	if {[have_spec x86]}     { return "-net nic,model=e1000" }
 	if {[have_spec lan9118]} { return "-net nic,model=lan9118" } }
 
-append qemu_args "-m 384 -nographic -net user -redir udp:5555::1337 [nic_qemu_args]"
+append qemu_args "-nographic -net user -redir udp:5555::1337 [nic_qemu_args]"
 
 run_genode_until {.*Test done.*\n.*Test done.*\n} 60
diff --git a/repos/libports/run/nic_router.run b/repos/libports/run/nic_router.run
index b6b8f4f89..75b1caff8 100644
--- a/repos/libports/run/nic_router.run
+++ b/repos/libports/run/nic_router.run
@@ -284,6 +284,6 @@ proc nic_qemu_args { } {
 	if {[have_spec x86]}     { return "-net nic,model=e1000" }
 	if {[have_spec lan9118]} { return "-net nic,model=lan9118" } }
 
-append qemu_args "-m 384 -nographic -net user -redir udp:5555::1337 [nic_qemu_args]"
+append qemu_args "-nographic -net user -redir udp:5555::1337 [nic_qemu_args]"
 
 run_genode_until {.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n} 60
diff --git a/repos/libports/run/pthread.run b/repos/libports/run/pthread.run
index ee2fcceb2..7d1121148 100644
--- a/repos/libports/run/pthread.run
+++ b/repos/libports/run/pthread.run
@@ -35,6 +35,6 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so pthread.lib.so posix.lib.so
 }
 
-append qemu_args " -nographic -m 128 "
+append qemu_args " -nographic  "
 
 run_genode_until {--- returning from main ---.*\n} 10
diff --git a/repos/libports/run/python.run b/repos/libports/run/python.run
index 52f9f4c22..3ff37ca08 100644
--- a/repos/libports/run/python.run
+++ b/repos/libports/run/python.run
@@ -81,7 +81,7 @@ build_boot_image $boot_modules
 # Execute test case
 #
 
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until {.*child "test-python" exited with exit value 0.*} 60
 
diff --git a/repos/libports/run/qt5.run b/repos/libports/run/qt5.run
index e1f26883f..cac0569c3 100644
--- a/repos/libports/run/qt5.run
+++ b/repos/libports/run/qt5.run
@@ -113,7 +113,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 512"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_calculatorform.run b/repos/libports/run/qt5_calculatorform.run
index fa4beafea..f94140bcc 100644
--- a/repos/libports/run/qt5_calculatorform.run
+++ b/repos/libports/run/qt5_calculatorform.run
@@ -85,7 +85,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_openglwindow.run b/repos/libports/run/qt5_openglwindow.run
index f49c55731..7576b5a2f 100644
--- a/repos/libports/run/qt5_openglwindow.run
+++ b/repos/libports/run/qt5_openglwindow.run
@@ -84,7 +84,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_qpluginwidget.run b/repos/libports/run/qt5_qpluginwidget.run
index 25a069c5d..2ecfccd8c 100644
--- a/repos/libports/run/qt5_qpluginwidget.run
+++ b/repos/libports/run/qt5_qpluginwidget.run
@@ -110,7 +110,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_quicktest.run b/repos/libports/run/qt5_quicktest.run
index a2823dcff..da75a8366 100644
--- a/repos/libports/run/qt5_quicktest.run
+++ b/repos/libports/run/qt5_quicktest.run
@@ -94,7 +94,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_samegame.run b/repos/libports/run/qt5_samegame.run
index e49069be7..021c8a2b0 100644
--- a/repos/libports/run/qt5_samegame.run
+++ b/repos/libports/run/qt5_samegame.run
@@ -94,7 +94,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_tetrix.run b/repos/libports/run/qt5_tetrix.run
index aa195bfe3..bebe3be13 100644
--- a/repos/libports/run/qt5_tetrix.run
+++ b/repos/libports/run/qt5_tetrix.run
@@ -86,7 +86,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256"
 
 run_genode_until forever
 
diff --git a/repos/libports/run/qt5_textedit.run b/repos/libports/run/qt5_textedit.run
index b24c3c88d..bde48a596 100644
--- a/repos/libports/run/qt5_textedit.run
+++ b/repos/libports/run/qt5_textedit.run
@@ -163,7 +163,7 @@ catch { exec sh -c $cmd }
 
 append_if $use_ahci_driver qemu_args " -drive id=disk,file=$disk_image,format=raw,if=none -device ahci,id=ahci -device ide-drive,drive=disk,bus=ahci.0 -boot d"
 
-append qemu_args " -m 256 -usbdevice tablet "
+append qemu_args "  -usbdevice tablet "
 
 run_genode_until forever
 
diff --git a/repos/libports/run/rust.run b/repos/libports/run/rust.run
index acd4fe1fc..37ee35dc3 100644
--- a/repos/libports/run/rust.run
+++ b/repos/libports/run/rust.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core init test-rust ld.lib.so libc.lib.so libm.lib.so posix.lib.so"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until { 42 } 10
 
diff --git a/repos/libports/run/sdl.run b/repos/libports/run/sdl.run
index 0519a668e..593dc84dd 100644
--- a/repos/libports/run/sdl.run
+++ b/repos/libports/run/sdl.run
@@ -98,6 +98,5 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/libports/run/stdcxx.run b/repos/libports/run/stdcxx.run
index 7d8c9efad..3ccab0989 100644
--- a/repos/libports/run/stdcxx.run
+++ b/repos/libports/run/stdcxx.run
@@ -32,6 +32,6 @@ build_boot_image {
 	ld.lib.so libc.lib.so libm.lib.so stdcxx.lib.so posix.lib.so
 }
 
-append qemu_args " -nographic -m 64 "
+append qemu_args " -nographic  "
 
 run_genode_until ".*test-stdcxx finished.*\n" 10
diff --git a/repos/libports/run/test-ping_client.run b/repos/libports/run/test-ping_client.run
index 76bebd1f1..518c87e08 100644
--- a/repos/libports/run/test-ping_client.run
+++ b/repos/libports/run/test-ping_client.run
@@ -149,7 +149,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/libports/run/test-ping_server.run b/repos/libports/run/test-ping_server.run
index 22bc38cec..e1780b048 100644
--- a/repos/libports/run/test-ping_server.run
+++ b/repos/libports/run/test-ping_server.run
@@ -123,7 +123,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/os/run/ahci_bench.run b/repos/os/run/ahci_bench.run
index bbfb9c891..d85e00cd0 100644
--- a/repos/os/run/ahci_bench.run
+++ b/repos/os/run/ahci_bench.run
@@ -82,7 +82,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -nographic -m 256 "
+append qemu_args " -nographic  "
 append qemu_args " -drive id=disk,file=bin/ext2.raw,format=raw,if=none -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0 -boot d"
 append qemu_args " -drive id=cd,file=[run_dir]/../ahci_bench.iso,if=none,media=cdrom -device ide-cd,drive=cd,bus=ahci.1"
 
diff --git a/repos/os/run/ahci_blk.run b/repos/os/run/ahci_blk.run
index 490019849..1025589c8 100644
--- a/repos/os/run/ahci_blk.run
+++ b/repos/os/run/ahci_blk.run
@@ -81,7 +81,7 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -nographic -m 256 "
+append qemu_args " -nographic  "
 append qemu_args " -drive id=disk,file=bin/ext2.raw,format=raw,if=none -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0 -boot d"
 append qemu_args " -drive id=cd,file=[run_dir]/../ahci_blk.iso,if=none,media=cdrom -device ide-cd,drive=cd,bus=ahci.1"
 
diff --git a/repos/os/run/audio_out_click.run b/repos/os/run/audio_out_click.run
index 3e4feeef9..91a9e5b3f 100644
--- a/repos/os/run/audio_out_click.run
+++ b/repos/os/run/audio_out_click.run
@@ -113,6 +113,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 128 -nographic -soundhw es1370 "
+append qemu_args "  -nographic -soundhw es1370 "
 
 run_genode_until forever
diff --git a/repos/os/run/blk.run b/repos/os/run/blk.run
index 4bcf36d7d..e665b2297 100644
--- a/repos/os/run/blk.run
+++ b/repos/os/run/blk.run
@@ -48,5 +48,5 @@ install_config {
 #
 build_boot_image { core ld.lib.so init timer test-blk-srv test-blk-cli }
 
-append qemu_args " -nographic -m 64 "
+append qemu_args " -nographic  "
 run_genode_until "Tests finished successfully.*\n" 100
diff --git a/repos/os/run/blk_cache.run b/repos/os/run/blk_cache.run
index 63b86e80c..fc056eb7b 100644
--- a/repos/os/run/blk_cache.run
+++ b/repos/os/run/blk_cache.run
@@ -66,6 +66,6 @@ build_boot_image { core ld.lib.so init timer test-blk-srv blk_cache test-blk-cli
 #
 # Qemu
 #
-append qemu_args " -nographic -m 96 "
+append qemu_args " -nographic  "
 
 run_genode_until "Tests finished successfully.*\n" 60
diff --git a/repos/os/run/bomb.run b/repos/os/run/bomb.run
index f28574e51..57fa012a5 100644
--- a/repos/os/run/bomb.run
+++ b/repos/os/run/bomb.run
@@ -8,7 +8,7 @@ set sleep       1500
 set demand      [expr 1*1024*1024]
 
 if {[have_include "power_on/qemu"]} {
-	append qemu_args "-nographic -m 128"
+	append qemu_args "-nographic "
 } else {
 	# foc is really slow on native hardware executing this test - limit rounds
 	if {[have_spec foc]} {
diff --git a/repos/os/run/cpu_quota.run b/repos/os/run/cpu_quota.run
index 8bc30e55b..687e033c3 100644
--- a/repos/os/run/cpu_quota.run
+++ b/repos/os/run/cpu_quota.run
@@ -127,7 +127,7 @@ build_boot_image "core ld.lib.so init timer test-cpu_quota test-sync"
 # Execution
 #
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until ".*done.*\n.*done.*\n.*done.*\n" 110
 
diff --git a/repos/os/run/demo.run b/repos/os/run/demo.run
index 413ad0548..d9bff1eed 100644
--- a/repos/os/run/demo.run
+++ b/repos/os/run/demo.run
@@ -267,6 +267,5 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/os/run/dynamic_config.run b/repos/os/run/dynamic_config.run
index d52489e61..007d86444 100644
--- a/repos/os/run/dynamic_config.run
+++ b/repos/os/run/dynamic_config.run
@@ -41,7 +41,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-dynamic_config test-dynamic_config_server"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {obtained counter value 11 from config.*} 100
 
diff --git a/repos/os/run/dynamic_config_loader.run b/repos/os/run/dynamic_config_loader.run
index 86406f836..d22b5fe3d 100644
--- a/repos/os/run/dynamic_config_loader.run
+++ b/repos/os/run/dynamic_config_loader.run
@@ -39,7 +39,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer loader test-dynamic_config test-dynamic_config_loader"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {obtained counter value 11 from config.*} 100
 
diff --git a/repos/os/run/dynamic_config_slave.run b/repos/os/run/dynamic_config_slave.run
index cb03d12fe..88e5bada2 100644
--- a/repos/os/run/dynamic_config_slave.run
+++ b/repos/os/run/dynamic_config_slave.run
@@ -29,7 +29,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-dynamic_config test-dynamic_config_master"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {obtained counter value 11 from config.*} 100
 
diff --git a/repos/os/run/fault_detection.run b/repos/os/run/fault_detection.run
index 4562c1de6..22f26937d 100644
--- a/repos/os/run/fault_detection.run
+++ b/repos/os/run/fault_detection.run
@@ -75,6 +75,6 @@ build_boot_image $boot_modules
 # Execute test case
 #
 
-append qemu_args "-nographic -m 96"
+append qemu_args "-nographic "
 
 run_genode_until "--- finished fault_detection test ---.*\n" 30
diff --git a/repos/os/run/fb_bench.run b/repos/os/run/fb_bench.run
index 226fdd5ab..342c958d0 100644
--- a/repos/os/run/fb_bench.run
+++ b/repos/os/run/fb_bench.run
@@ -106,6 +106,6 @@ lappend_if [have_spec gpio]        boot_modules [gpio_drv]
 build_boot_image $boot_modules
 
 # disable QEMU graphic to enable testing on our machines without SDL and X
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- Framebuffer benchmark finished ---.*\n} 30
diff --git a/repos/os/run/fs_rom_update.run b/repos/os/run/fs_rom_update.run
index 71a07e777..08c070315 100644
--- a/repos/os/run/fs_rom_update.run
+++ b/repos/os/run/fs_rom_update.run
@@ -116,6 +116,6 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -nographic"
+append qemu_args "  -nographic"
 
 run_genode_until {.*child "test-libc_vfs" exited with exit value 0.*} 60
diff --git a/repos/os/run/init_smp.run b/repos/os/run/init_smp.run
index c18ba6cd4..0aa9823f5 100644
--- a/repos/os/run/init_smp.run
+++ b/repos/os/run/init_smp.run
@@ -96,7 +96,7 @@ install_config $config
 
 build_boot_image "core ld.lib.so init bomb timer"
 
-append qemu_args " -m [expr 128 + $init_ram*$cpus] -nographic -smp $cpus"
+append qemu_args " [expr 128 + $init_ram*$cpus] -nographic -smp $cpus"
 
 
 if { [get_cmd_switch --autopilot] } {
diff --git a/repos/os/run/input.run b/repos/os/run/input.run
index 604d5a840..848ec41d6 100644
--- a/repos/os/run/input.run
+++ b/repos/os/run/input.run
@@ -127,6 +127,5 @@ lappend_if [have_spec sdl] boot_modules fb_sdl
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/os/run/kdb_uart_drv.run b/repos/os/run/kdb_uart_drv.run
index 57022274f..cda3243b6 100644
--- a/repos/os/run/kdb_uart_drv.run
+++ b/repos/os/run/kdb_uart_drv.run
@@ -82,6 +82,6 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until forever
diff --git a/repos/os/run/loader.run b/repos/os/run/loader.run
index 70d075eac..d944ec369 100644
--- a/repos/os/run/loader.run
+++ b/repos/os/run/loader.run
@@ -107,6 +107,5 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
diff --git a/repos/os/run/mixer.run b/repos/os/run/mixer.run
index 74b6485b6..3178b5eb3 100644
--- a/repos/os/run/mixer.run
+++ b/repos/os/run/mixer.run
@@ -183,5 +183,5 @@ append boot_modules {
 append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
-append qemu_args "-m 256 -soundhw es1370 -nographic"
+append qemu_args "-soundhw es1370 -nographic"
 run_genode_until forever
diff --git a/repos/os/run/nic_loopback.run b/repos/os/run/nic_loopback.run
index 2957f437d..6cadc4edb 100644
--- a/repos/os/run/nic_loopback.run
+++ b/repos/os/run/nic_loopback.run
@@ -57,6 +57,6 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -nographic -serial mon:stdio -m 256 "
+append qemu_args " -nographic -serial mon:stdio  "
 
 run_genode_until {child .* exited with exit value 0.*} 60
diff --git a/repos/os/run/part_blk.inc b/repos/os/run/part_blk.inc
index 2d0bcdc3d..5fe6ba100 100644
--- a/repos/os/run/part_blk.inc
+++ b/repos/os/run/part_blk.inc
@@ -140,7 +140,7 @@ build_boot_image $boot_modules
 # Qemu
 #
 
-append qemu_args " -nographic -m 128 "
+append qemu_args " -nographic  "
 
 run_genode_until "Tests finished successfully.*\n.*Tests finished successfully.*\n" 100
 exec rm $img_path
diff --git a/repos/os/run/pci.run b/repos/os/run/pci.run
index 1bb25ba8e..954bdaaec 100644
--- a/repos/os/run/pci.run
+++ b/repos/os/run/pci.run
@@ -62,7 +62,7 @@ set boot_modules {
 append_platform_drv_boot_modules
 build_boot_image $boot_modules
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "--- Platform test finished ---.*\n" 10
 
diff --git a/repos/os/run/ram_fs_chunk.run b/repos/os/run/ram_fs_chunk.run
index 699d6cd24..95a6c7308 100644
--- a/repos/os/run/ram_fs_chunk.run
+++ b/repos/os/run/ram_fs_chunk.run
@@ -29,7 +29,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-ram_fs_chunk"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- RAM filesystem chunk test finished ---.*\n} 10
 
diff --git a/repos/os/run/report_rom.run b/repos/os/run/report_rom.run
index 8ddf6fc4b..61426cdc3 100644
--- a/repos/os/run/report_rom.run
+++ b/repos/os/run/report_rom.run
@@ -45,7 +45,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer report_rom test-report_rom"
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until {child "test-report_rom" exited with exit value 0.*\n} 30
 
diff --git a/repos/os/run/resource_request.run b/repos/os/run/resource_request.run
index 2625a0cd7..fe8fa31ee 100644
--- a/repos/os/run/resource_request.run
+++ b/repos/os/run/resource_request.run
@@ -51,6 +51,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer report_rom test-resource_request"
 
-append qemu_args "-nographic -m 128"
+append qemu_args "-nographic "
 
 run_genode_until {child "test-resource_request" exited with exit value 0.*\n} 60
diff --git a/repos/os/run/resource_yield.run b/repos/os/run/resource_yield.run
index 1c28c2c09..d9affc32a 100644
--- a/repos/os/run/resource_yield.run
+++ b/repos/os/run/resource_yield.run
@@ -33,6 +33,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-resource_yield"
 
-append qemu_args "-nographic -m 96"
+append qemu_args "-nographic "
 
 run_genode_until {--- test-resource_yield finished ---.*\n} 50
diff --git a/repos/os/run/rom_blk.run b/repos/os/run/rom_blk.run
index c6e06dbed..252ecacb8 100644
--- a/repos/os/run/rom_blk.run
+++ b/repos/os/run/rom_blk.run
@@ -30,6 +30,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init rom_blk test-rom_blk"
 
-append qemu_args "-m 64 -nographic "
+append qemu_args "-nographic "
 
 run_genode_until {.*--- ROM Block test finished ---.*\n} 10
diff --git a/repos/os/run/rtc.run b/repos/os/run/rtc.run
index cccf560e0..b7b0d3f1d 100644
--- a/repos/os/run/rtc.run
+++ b/repos/os/run/rtc.run
@@ -35,6 +35,6 @@ install_config {
 
 build_boot_image { core ld.lib.so init timer rtc_drv test-rtc }
 
-append qemu_args " -nographic -m 128 "
+append qemu_args " -nographic  "
 
 run_genode_until ".*--- RTC test finished ---.*\n" 20
diff --git a/repos/os/run/signal.run b/repos/os/run/signal.run
index f420ce941..a25b8fa26 100644
--- a/repos/os/run/signal.run
+++ b/repos/os/run/signal.run
@@ -31,7 +31,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-signal"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- Signalling test finished ---.*\n} 200
 
diff --git a/repos/os/run/tar_rom.run b/repos/os/run/tar_rom.run
index 0ea527797..a7755de7c 100644
--- a/repos/os/run/tar_rom.run
+++ b/repos/os/run/tar_rom.run
@@ -79,7 +79,7 @@ exec sh -c "cd bin; tar cfh archive.tar test-timer"
 
 build_boot_image "core ld.lib.so init timer tar_rom archive.tar"
 
-append qemu_args "-nographic -m 96"
+append qemu_args "-nographic "
 
 run_genode_until "--- timer test ---" 10
 
diff --git a/repos/os/run/terminal_crosslink.run b/repos/os/run/terminal_crosslink.run
index 1eb795675..0dcac29e2 100644
--- a/repos/os/run/terminal_crosslink.run
+++ b/repos/os/run/terminal_crosslink.run
@@ -60,7 +60,7 @@ build_boot_image {
 	test-terminal_crosslink
 }
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 #
 # Execute test case
diff --git a/repos/os/run/thread_join.run b/repos/os/run/thread_join.run
index 415641893..c00d1c04a 100644
--- a/repos/os/run/thread_join.run
+++ b/repos/os/run/thread_join.run
@@ -31,6 +31,6 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-thread_join"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*--- Thread join test finished ---.*\n} 10
diff --git a/repos/os/run/timed_semaphore.run b/repos/os/run/timed_semaphore.run
index c16cf6082..61bd9246c 100644
--- a/repos/os/run/timed_semaphore.run
+++ b/repos/os/run/timed_semaphore.run
@@ -53,6 +53,6 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 64 -nographic "
+append qemu_args "  -nographic "
 
 run_genode_until {.*--- Timed semaphore test finished ---.*\n} 10
diff --git a/repos/os/run/timeout.run b/repos/os/run/timeout.run
index 8cf04ca95..7b41a581a 100644
--- a/repos/os/run/timeout.run
+++ b/repos/os/run/timeout.run
@@ -65,7 +65,7 @@ build_boot_image "core ld.lib.so init timer test-timeout"
 # Execution
 #
 
-append qemu_args "-nographic -m 350"
+append qemu_args "-nographic "
 
 run_genode_until "child \"test\" exited with exit value.*\n" 900
 grep_output {\[init\] child "test" exited with exit value}
diff --git a/repos/os/run/timer.run b/repos/os/run/timer.run
index f4877c120..aa0f2f188 100644
--- a/repos/os/run/timer.run
+++ b/repos/os/run/timer.run
@@ -43,7 +43,7 @@ install_config {
 build_boot_image { core ld.lib.so init timer test-timer }
 
 # Configure Qemu
-append qemu_args " -m 64 -nographic"
+append qemu_args "  -nographic"
 
 # Execute test in Qemu
 run_genode_until "--- timer test finished ---" 60
diff --git a/repos/os/run/timer_accuracy.run b/repos/os/run/timer_accuracy.run
index 078e4b50b..440e28a77 100644
--- a/repos/os/run/timer_accuracy.run
+++ b/repos/os/run/timer_accuracy.run
@@ -35,7 +35,7 @@ install_config {
 build_boot_image { core ld.lib.so init timer test-timer_accuracy }
 
 # configure Qemu
-append qemu_args " -m 64 -nographic"
+append qemu_args "  -nographic"
 
 set err_cnt      0
 set test_timeout 20
diff --git a/repos/os/run/trace.run b/repos/os/run/trace.run
index 3658f0b13..60b95c920 100644
--- a/repos/os/run/trace.run
+++ b/repos/os/run/trace.run
@@ -69,7 +69,7 @@ set boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -nographic -serial mon:stdio -m 256 "
+append qemu_args " -nographic -serial mon:stdio  "
 append_if [have_spec x86] qemu_args " -smp 2 "
 
 run_genode_until {.*child "test-trace" exited with exit value 0.*} 30
diff --git a/repos/os/run/usb_block.run b/repos/os/run/usb_block.run
index 403b6ecf7..373fceb51 100644
--- a/repos/os/run/usb_block.run
+++ b/repos/os/run/usb_block.run
@@ -160,7 +160,7 @@ if {$use_qemu} {
 #
 # Qemu opts for EHCI
 #
-append qemu_args " -m 256 -nographic -M pc -boot order=d "
+append qemu_args "  -nographic -M pc -boot order=d "
 append qemu_args " -drive if=none,id=disk,file=$disk_image,format=raw "
 append qemu_args " -device usb-ehci,id=ehci -device usb-storage,bus=ehci.0,drive=disk "
 
diff --git a/repos/os/run/weak_ptr.run b/repos/os/run/weak_ptr.run
index bc202f58f..5034bed90 100644
--- a/repos/os/run/weak_ptr.run
+++ b/repos/os/run/weak_ptr.run
@@ -30,7 +30,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init timer test-weak_ptr"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "--- finished test-weak_ptr ---.*\n" 30
 
diff --git a/repos/os/run/xml_generator.run b/repos/os/run/xml_generator.run
index 443884efb..c867d6a2d 100644
--- a/repos/os/run/xml_generator.run
+++ b/repos/os/run/xml_generator.run
@@ -24,7 +24,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-xml_generator"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until "--- XML generator test finished ---.*\n" 30
 
diff --git a/repos/os/run/xml_node.run b/repos/os/run/xml_node.run
index 11dd562b9..8096f5a8d 100644
--- a/repos/os/run/xml_node.run
+++ b/repos/os/run/xml_node.run
@@ -23,7 +23,7 @@ install_config {
 
 build_boot_image "core ld.lib.so init test-xml_node"
 
-append qemu_args "-nographic -m 64"
+append qemu_args "-nographic "
 
 run_genode_until {.*child "test-xml_node" exited with exit value 0.*\n} 10
 
diff --git a/repos/ports/run/arora.run b/repos/ports/run/arora.run
index a08f52526..85614fd3e 100644
--- a/repos/ports/run/arora.run
+++ b/repos/ports/run/arora.run
@@ -163,7 +163,6 @@ append boot_modules {
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 512 "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
diff --git a/repos/ports/run/debug_nitpicker.run b/repos/ports/run/debug_nitpicker.run
index 30db8c9b0..360f5c472 100644
--- a/repos/ports/run/debug_nitpicker.run
+++ b/repos/ports/run/debug_nitpicker.run
@@ -143,7 +143,6 @@ build_boot_image $boot_modules
 set local_port 5555
 
 # qemu config
-append qemu_args " -m 128 "
 
 # connect comport 0 to stdio
 append qemu_args " -serial mon:stdio "
diff --git a/repos/ports/run/dosbox.run b/repos/ports/run/dosbox.run
index be3949af1..c9c5ea004 100644
--- a/repos/ports/run/dosbox.run
+++ b/repos/ports/run/dosbox.run
@@ -138,6 +138,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 -soundhw es1370 "
+append qemu_args "  -soundhw es1370 "
 
 run_genode_until forever
diff --git a/repos/ports/run/gdb_monitor.run b/repos/ports/run/gdb_monitor.run
index 6dc92045f..7204af437 100644
--- a/repos/ports/run/gdb_monitor.run
+++ b/repos/ports/run/gdb_monitor.run
@@ -113,7 +113,7 @@ build_boot_image $boot_modules
 set local_port 5555
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 # connect comport 0 to stdio
 append qemu_args " -serial mon:stdio "
diff --git a/repos/ports/run/gdb_monitor_interactive.run b/repos/ports/run/gdb_monitor_interactive.run
index 1192aa454..b3a704eda 100644
--- a/repos/ports/run/gdb_monitor_interactive.run
+++ b/repos/ports/run/gdb_monitor_interactive.run
@@ -101,7 +101,7 @@ build_boot_image $boot_modules
 set local_port 5555
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 # connect comport 0 to stdio
 append qemu_args " -serial mon:stdio "
diff --git a/repos/ports/run/gdb_monitor_target_config.run b/repos/ports/run/gdb_monitor_target_config.run
index cc8585716..918dcf81f 100644
--- a/repos/ports/run/gdb_monitor_target_config.run
+++ b/repos/ports/run/gdb_monitor_target_config.run
@@ -100,7 +100,7 @@ build_boot_image $boot_modules
 set local_port 5555
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 # connect comport 0 to stdio
 append qemu_args " -serial mon:stdio "
diff --git a/repos/ports/run/netperf.inc b/repos/ports/run/netperf.inc
index a33c7f338..91e5d052f 100644
--- a/repos/ports/run/netperf.inc
+++ b/repos/ports/run/netperf.inc
@@ -305,7 +305,7 @@ build_boot_image $boot_modules
 #
 
 # qemu config
-append qemu_args " -m 128 -nographic "
+append qemu_args "  -nographic "
 
 append_if [have_spec x86]     qemu_args " -net nic,model=e1000 "
 append_if [have_spec lan9118] qemu_args " -net nic,model=lan9118 "
@@ -338,7 +338,7 @@ sleep 3
 foreach netperf_test $netperf_tests {
 	puts "\n---------------------------- $netperf_test -----------------------"
 
-	spawn netperf-$version -H $ip_addr -P 1 -v 2 -t $netperf_test -c -C -- -m $packet_size $force_ports
+	spawn netperf-$version -H $ip_addr -P 1 -v 2 -t $netperf_test -c -C -- $packet_size $force_ports
 	set netperf_id $spawn_id
 
 	set spawn_id_list [list $netperf_id $serial_id]
diff --git a/repos/ports/run/noux.run b/repos/ports/run/noux.run
index 601523450..ca5abf35f 100644
--- a/repos/ports/run/noux.run
+++ b/repos/ports/run/noux.run
@@ -48,7 +48,6 @@ append qemu_args " -nographic -serial mon:stdio "
 
 if {[have_spec x86_64]} {
 	# coreutils.tar is really huge when built for x86_64
-	append qemu_args " -m 300 "
 }
 
 run_genode_until {child "noux" exited with exit value 0.*\n} 30
diff --git a/repos/ports/run/noux_bash.run b/repos/ports/run/noux_bash.run
index d253edb73..38b9d7c93 100644
--- a/repos/ports/run/noux_bash.run
+++ b/repos/ports/run/noux_bash.run
@@ -209,7 +209,6 @@ build_boot_image $boot_modules
 
 if {[have_spec x86_64]} {
 	# bash.tar is really huge when built for x86_64
-	append qemu_args " -m 320 "
 }
 
 run_genode_until forever
diff --git a/repos/ports/run/noux_gdb.run b/repos/ports/run/noux_gdb.run
index 9d1b0535e..b8b0f4820 100644
--- a/repos/ports/run/noux_gdb.run
+++ b/repos/ports/run/noux_gdb.run
@@ -245,7 +245,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 256 "
 
 run_genode_until forever
 
diff --git a/repos/ports/run/noux_shell_script.run b/repos/ports/run/noux_shell_script.run
index ac86da300..f3cca3bcf 100644
--- a/repos/ports/run/noux_shell_script.run
+++ b/repos/ports/run/noux_shell_script.run
@@ -162,6 +162,5 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 300 "
 
 run_genode_until forever
diff --git a/repos/ports/run/noux_terminal_fs.run b/repos/ports/run/noux_terminal_fs.run
index 5922caeb2..041ed5ad1 100644
--- a/repos/ports/run/noux_terminal_fs.run
+++ b/repos/ports/run/noux_terminal_fs.run
@@ -203,6 +203,5 @@ append_platform_drv_boot_modules
 build_boot_image $boot_modules
 
 # bash.tar is really huge when built for x86_64
-if {[have_spec x86_64]} { append qemu_args " -m 300 " }
 
 run_genode_until forever
diff --git a/repos/ports/run/noux_trace_fs.run b/repos/ports/run/noux_trace_fs.run
index 2c972a6cc..91de237b1 100644
--- a/repos/ports/run/noux_trace_fs.run
+++ b/repos/ports/run/noux_trace_fs.run
@@ -226,7 +226,6 @@ append_platform_drv_boot_modules
 
 build_boot_image $boot_modules
 
-append qemu_args " -m 512 "
 
 run_genode_until forever
 
diff --git a/repos/ports/run/noux_two_terminal_fs.run b/repos/ports/run/noux_two_terminal_fs.run
index 45881d657..eb936837b 100644
--- a/repos/ports/run/noux_two_terminal_fs.run
+++ b/repos/ports/run/noux_two_terminal_fs.run
@@ -237,6 +237,5 @@ append_platform_drv_boot_modules
 build_boot_image $boot_modules
 
 # bash.tar is really huge when built for x86_64
-if {[have_spec x86_64]} { append qemu_args " -m 300 " }
 
 run_genode_until forever
diff --git a/repos/ports/run/noux_uname.run b/repos/ports/run/noux_uname.run
index c3017f0af..a3b139b8a 100644
--- a/repos/ports/run/noux_uname.run
+++ b/repos/ports/run/noux_uname.run
@@ -61,6 +61,5 @@ build_boot_image {
 append qemu_args " -nographic -serial mon:stdio "
 
 # coreutils.tar is really huge when built for x86_64
-if {[have_spec x86_64]} { append qemu_args " -m 300 " }
 
 run_genode_until {child "noux" exited with exit value 0.*\n} 30
diff --git a/repos/ports/run/seoul-auto.run b/repos/ports/run/seoul-auto.run
index 22b07067c..297f9d5f9 100644
--- a/repos/ports/run/seoul-auto.run
+++ b/repos/ports/run/seoul-auto.run
@@ -54,7 +54,6 @@ foreach binary $guest_os_binaries {
 
 source ${genode_dir}/repos/ports/run/seoul.inc
 
-append qemu_args " -m 512 "
 append qemu_args " -cpu phenom "
 append qemu_args " -net nic,model=e1000 "
 append qemu_args " -nographic "
diff --git a/repos/ports/run/seoul-net.run b/repos/ports/run/seoul-net.run
index a89dd9539..9c38db8ce 100644
--- a/repos/ports/run/seoul-net.run
+++ b/repos/ports/run/seoul-net.run
@@ -52,7 +52,6 @@ foreach binary $guest_os_binaries {
 
 source ${genode_dir}/repos/ports/run/seoul.inc
 
-append qemu_args " -m 512 "
 append qemu_args " -cpu phenom "
 append qemu_args " -net nic,model=e1000 "
 
diff --git a/repos/ports/run/vmm_utils.run b/repos/ports/run/vmm_utils.run
index 3f215c886..518a1a982 100644
--- a/repos/ports/run/vmm_utils.run
+++ b/repos/ports/run/vmm_utils.run
@@ -30,7 +30,6 @@ install_config {
 
 build_boot_image { core ld.lib.so init timer test-vmm_utils }
 
-append qemu_args " -m 512 "
 append qemu_args " -cpu phenom "
 append qemu_args " -nographic "
 
diff --git a/tool/run/power_on/qemu b/tool/run/power_on/qemu
index b37651d89..0a637e046 100644
--- a/tool/run/power_on/qemu
+++ b/tool/run/power_on/qemu
@@ -72,6 +72,9 @@ proc run_power_on { } {
 
 	# on x86, we support booting via pxe or iso/disk image
 	if {[have_spec x86]} {
+		if {![regexp -- {-m} $qemu_args dummy]} {
+			append qemu_args " -m 512 "
+		}
 		if {[have_include "load/tftp"]} {
 			append qemu_args " -boot n -tftp [run_dir] -bootp boot/pulsar -no-reboot -no-shutdown "
 		} else {