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Sigma0: raise sigma0's priority to maximum.

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When sigma0 runs on a lower priority than the rest of the threads in the system
it might come to the point that while answering a page fault or I/O memory area
request the timeslice of the caller (core-pager) gets fully consumed. As long as
other threads are still executable and don't block sigma0 won't do progress
anymore, because it runs at the lowest priority.  This commit simply sets
sigma0's priority to the highest in the system.

Was: 'sigma0_prio.patch'
This commit is contained in:
Sebastian Sumpf
2013-01-11 17:38:28 +01:00
parent 3cae95ac84
commit e720764a9b
1 changed files with 5 additions and 0 deletions
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5
l4/pkg/sigma0/server/src/init.cc
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@@ -27,6 +27,7 @@
#include "ioports.h" #include "ioports.h"
#include "mem_man_test.h" #include "mem_man_test.h"
#include <l4/sys/debugger.h> #include <l4/sys/debugger.h>
#include <l4/sys/scheduler.h>
/* started as the L4 sigma0 task from crt0.S */ /* started as the L4 sigma0 task from crt0.S */
@@ -61,6 +62,10 @@ init(l4_kernel_info_t *info)
l4_debugger_set_object_name(L4_BASE_FACTORY_CAP, "root factory"); l4_debugger_set_object_name(L4_BASE_FACTORY_CAP, "root factory");
l4_debugger_set_object_name(L4_BASE_THREAD_CAP, "sigma0"); l4_debugger_set_object_name(L4_BASE_THREAD_CAP, "sigma0");
l4_sched_param_t params = l4_sched_param(255);
l4_scheduler_run_thread(L4_BASE_SCHEDULER_CAP, L4_BASE_THREAD_CAP, &params);
Page_alloc_base::init(); Page_alloc_base::init();
init_memory(info); init_memory(info);