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SLEEPQUEUE(9): Avoid Giant lock

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This commit is contained in:
Sebastian Huber 2015-04-23 15:42:58 +02:00
parent b3ff71e003
commit c2f2392028
1 changed files with 0 additions and 8 deletions
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8
freebsd/sys/kern/subr_sleepqueue.c
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@ -638,9 +638,7 @@ sleepq_switch(void *wchan, int pri)
cpu_self = _Thread_Dispatch_disable_critical(); cpu_self = _Thread_Dispatch_disable_critical();
_Thread_Lock_release_default(executing, &lock_context); _Thread_Lock_release_default(executing, &lock_context);
_Giant_Acquire(cpu_self);
_Thread_Set_state(executing, STATES_WAITING_FOR_BSD_WAKEUP); _Thread_Set_state(executing, STATES_WAITING_FOR_BSD_WAKEUP);
_Giant_Release(cpu_self);
_Thread_Lock_acquire_default(executing, &lock_context); _Thread_Lock_acquire_default(executing, &lock_context);
@ -666,10 +664,8 @@ sleepq_switch(void *wchan, int pri)
_Thread_Lock_release_default(executing, &lock_context); _Thread_Lock_release_default(executing, &lock_context);
if (unblock) { if (unblock) {
_Giant_Acquire(cpu_self);
_Watchdog_Remove(&executing->Timer); _Watchdog_Remove(&executing->Timer);
_Thread_Clear_state(executing, STATES_WAITING_FOR_BSD_WAKEUP); _Thread_Clear_state(executing, STATES_WAITING_FOR_BSD_WAKEUP);
_Giant_Release(cpu_self);
} }
_Thread_Dispatch_enable(cpu_self); _Thread_Dispatch_enable(cpu_self);
@ -971,12 +967,10 @@ sleepq_resume_thread(struct sleepqueue *sq, struct thread *td, int pri)
cpu_self = _Thread_Dispatch_disable_critical(); cpu_self = _Thread_Dispatch_disable_critical();
_Thread_Lock_release_default(thread, &lock_context); _Thread_Lock_release_default(thread, &lock_context);
_Giant_Acquire(cpu_self);
_Watchdog_Remove(&thread->Timer); _Watchdog_Remove(&thread->Timer);
_Thread_Clear_state(thread, STATES_WAITING_FOR_BSD_WAKEUP); _Thread_Clear_state(thread, STATES_WAITING_FOR_BSD_WAKEUP);
_Giant_Release(cpu_self);
_Thread_Dispatch_enable(cpu_self); _Thread_Dispatch_enable(cpu_self);
} else { } else {
_Thread_Lock_release_default(thread, &lock_context); _Thread_Lock_release_default(thread, &lock_context);
@ -1201,11 +1195,9 @@ sleepq_timeout(Objects_Id id, void *arg)
cpu_self = _Thread_Dispatch_disable_critical(); cpu_self = _Thread_Dispatch_disable_critical();
_Thread_Lock_release_default(thread, &lock_context); _Thread_Lock_release_default(thread, &lock_context);
_Giant_Acquire(cpu_self);
_Thread_Clear_state(thread, STATES_WAITING_FOR_BSD_WAKEUP); _Thread_Clear_state(thread, STATES_WAITING_FOR_BSD_WAKEUP);
_Giant_Release(cpu_self);
_Thread_Dispatch_enable(cpu_self); _Thread_Dispatch_enable(cpu_self);
} else { } else {
_Thread_Lock_release_default(thread, &lock_context); _Thread_Lock_release_default(thread, &lock_context);