Messages in this thread Patch in this message |  | | Date | Sun, 31 Oct 2004 00:38:03 +1000 | | From | Con Kolivas <> | | Subject | [PATCH][plugsched 8/28] Make conditional reschedule public |
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Make conditional reschedule public
Move the conditional reschedule entries into the common code.
Signed-off-by: Con Kolivas <kernel@kolivas.org>
Index: linux-2.6.10-rc1-mm2-plugsched1/kernel/sched.c =================================================================== --- linux-2.6.10-rc1-mm2-plugsched1.orig/kernel/sched.c 2004-10-29 21:46:58.463065654 +1000 +++ linux-2.6.10-rc1-mm2-plugsched1/kernel/sched.c 2004-10-29 21:47:01.213636390 +1000 @@ -3162,72 +3162,6 @@ static long ingo_sys_sched_yield(void) return 0; } -static inline void __cond_resched(void) -{ - do { - add_preempt_count(PREEMPT_ACTIVE); - schedule(); - sub_preempt_count(PREEMPT_ACTIVE); - } while (need_resched()); -} - -int __sched cond_resched(void) -{ - if (need_resched()) { - __cond_resched(); - return 1; - } - return 0; -} - -EXPORT_SYMBOL(cond_resched); - -/* - * cond_resched_lock() - if a reschedule is pending, drop the given lock, - * call schedule, and on return reacquire the lock. - * - * This works OK both with and without CONFIG_PREEMPT. We do strange low-level - * operations here to prevent schedule() from being called twice (once via - * spin_unlock(), once by hand). - */ -int cond_resched_lock(spinlock_t * lock) -{ -#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT) - if (lock->break_lock) { - lock->break_lock = 0; - spin_unlock(lock); - cpu_relax(); - spin_lock(lock); - } -#endif - if (need_resched()) { - _raw_spin_unlock(lock); - preempt_enable_no_resched(); - __cond_resched(); - spin_lock(lock); - return 1; - } - return 0; -} - -EXPORT_SYMBOL(cond_resched_lock); - -int __sched cond_resched_softirq(void) -{ - BUG_ON(!in_softirq()); - - if (need_resched()) { - __local_bh_enable(); - __cond_resched(); - local_bh_disable(); - return 1; - } - return 0; -} - -EXPORT_SYMBOL(cond_resched_softirq); - - /** * yield - yield the current processor to other threads. * Index: linux-2.6.10-rc1-mm2-plugsched1/kernel/scheduler.c =================================================================== --- linux-2.6.10-rc1-mm2-plugsched1.orig/kernel/scheduler.c 2004-10-29 21:46:58.465065342 +1000 +++ linux-2.6.10-rc1-mm2-plugsched1/kernel/scheduler.c 2004-10-29 21:47:01.214636234 +1000 @@ -556,6 +556,71 @@ asmlinkage long sys_sched_get_priority_m return ret; } +static inline void __cond_resched(void) +{ + do { + add_preempt_count(PREEMPT_ACTIVE); + schedule(); + sub_preempt_count(PREEMPT_ACTIVE); + } while (need_resched()); +} + +int __sched cond_resched(void) +{ + if (need_resched()) { + __cond_resched(); + return 1; + } + return 0; +} + +EXPORT_SYMBOL(cond_resched); + +/* + * cond_resched_lock() - if a reschedule is pending, drop the given lock, + * call schedule, and on return reacquire the lock. + * + * This works OK both with and without CONFIG_PREEMPT. We do strange low-level + * operations here to prevent schedule() from being called twice (once via + * spin_unlock(), once by hand). + */ +int cond_resched_lock(spinlock_t * lock) +{ +#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT) + if (lock->break_lock) { + lock->break_lock = 0; + spin_unlock(lock); + cpu_relax(); + spin_lock(lock); + } +#endif + if (need_resched()) { + _raw_spin_unlock(lock); + preempt_enable_no_resched(); + __cond_resched(); + spin_lock(lock); + return 1; + } + return 0; +} + +EXPORT_SYMBOL(cond_resched_lock); + +int __sched cond_resched_softirq(void) +{ + BUG_ON(!in_softirq()); + + if (need_resched()) { + __local_bh_enable(); + __cond_resched(); + local_bh_disable(); + return 1; + } + return 0; +} + +EXPORT_SYMBOL(cond_resched_softirq); + extern struct sched_drv ingo_sched_drv; static const struct sched_drv *scheduler = &ingo_sched_drv; [unhandled content-type:application/pgp-signature] |  |