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d295f11a3a
The previous implementation of clearing global IRQ in sched_addreadytorun() and sched_removereadytorun() was done too early. As a result, nxsem_post() would have a chance to enter the critical section even nxsem_wait() is still not in blocked state. This patch moves clearing global IRQ controls from sched_addreadytorun() and sched_removereadytorun() to sched_resumescheduler() to ensure that nxsem_post() can enter the critical section correctly. For this change, sched_resumescheduler.c is always necessary for SMP configuration. In addition, by this change, task_exit() had to be modified so that it calls sched_resumescheduler() because it calls sched_removescheduler() inside the function, otherwise it will cause a deadlock. However, I encountered another DEBUGASSERT() in sched_cpu_select() during HTTP streaming aging test on lc823450-xgevk. Actually sched_cpu_select() accesses the g_assignedtasks which might be changed by another CPU. Similarly, other tasklists might be modified simultaneously if both CPUs are executing scheduling logic. To avoid this, I introduced tasklist protetion APIs. With these changes, SMP kernel stability has been much improved. Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com> |
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| net | ||
| netinet | ||
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| nuttx | ||
| sys | ||
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| aio.h | ||
| assert.h | ||
| crc8.h | ||
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| errno.h | ||
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| inttypes.h | ||
| libgen.h | ||
| limits.h | ||
| locale.h | ||
| mqueue.h | ||
| netdb.h | ||
| nxflat.h | ||
| poll.h | ||
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| sched.h | ||
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