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When concurrency level is reduced and a kse is exiting, make sure no other

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threads are still referencing the kse by migrating them to initial kse.

Reviewed by: deischen
This commit is contained in:
David Xu 2003-09-29 06:25:04 +00:00
parent 2b0761b360
commit ee74732c91
2 changed files with 26 additions and 0 deletions
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13
lib/libkse/thread/thr_kern.c
View File

@ -1805,6 +1805,7 @@ kse_fini(struct kse *kse)
{
/* struct kse_group *free_kseg = NULL; */
struct timespec ts;
struct pthread *td;
/*
* Check to see if this is one of the main kses.
@ -1844,10 +1845,22 @@ kse_fini(struct kse *kse)
KSE_SCHED_LOCK(kse, kse->k_kseg);
TAILQ_REMOVE(&kse->k_kseg->kg_kseq, kse, k_kgqe);
kse->k_kseg->kg_ksecount--;
/*
* Migrate thread to _kse_initial if its lastest
* kse it ran on is the kse.
*/
td = TAILQ_FIRST(&kse->k_kseg->kg_threadq);
while (td != NULL) {
if (td->kse == kse)
td->kse = _kse_initial;
td = TAILQ_NEXT(td, kle);
}
KSE_SCHED_UNLOCK(kse, kse->k_kseg);
KSE_LOCK_ACQUIRE(kse, &kse_lock);
kse_free_unlocked(kse);
KSE_LOCK_RELEASE(kse, &kse_lock);
/* Make sure there is always at least one is awake */
KSE_WAKEUP(_kse_initial);
kse_exit();
/* Never returns. */
PANIC("kse_exit() failed for initial kseg");

13
lib/libpthread/thread/thr_kern.c
View File

@ -1805,6 +1805,7 @@ kse_fini(struct kse *kse)
{
/* struct kse_group *free_kseg = NULL; */
struct timespec ts;
struct pthread *td;
/*
* Check to see if this is one of the main kses.
@ -1844,10 +1845,22 @@ kse_fini(struct kse *kse)
KSE_SCHED_LOCK(kse, kse->k_kseg);
TAILQ_REMOVE(&kse->k_kseg->kg_kseq, kse, k_kgqe);
kse->k_kseg->kg_ksecount--;
/*
* Migrate thread to _kse_initial if its lastest
* kse it ran on is the kse.
*/
td = TAILQ_FIRST(&kse->k_kseg->kg_threadq);
while (td != NULL) {
if (td->kse == kse)
td->kse = _kse_initial;
td = TAILQ_NEXT(td, kle);
}
KSE_SCHED_UNLOCK(kse, kse->k_kseg);
KSE_LOCK_ACQUIRE(kse, &kse_lock);
kse_free_unlocked(kse);
KSE_LOCK_RELEASE(kse, &kse_lock);
/* Make sure there is always at least one is awake */
KSE_WAKEUP(_kse_initial);
kse_exit();
/* Never returns. */
PANIC("kse_exit() failed for initial kseg");