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Code Issues Releases Activity

If a spin lock is held for too long and WITNESS is enabled, then call

Browse Source 
witness_display_spinlock() to see if we can find out where the current
owner of the spin lock last acquired the lock.
This commit is contained in:
John Baldwin 2003-07-31 18:52:18 +00:00
parent 1beccae67c
commit 4110951861
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=118272
2 changed files with 18 additions and 6 deletions
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12
sys/kern/kern_mutex.c
View File

@ -690,12 +690,18 @@ _mtx_lock_spin(struct mtx *m, int opts, const char *file, int line)
if (i < 60000000)
DELAY(1);
#ifdef DDB
else if (!db_active)
else if (!db_active) {
#else
else
else {
#endif
panic("spin lock %s held by %p for > 5 seconds",
printf("spin lock %s held by %p for > 5 seconds\n",
m->mtx_object.lo_name, (void *)m->mtx_lock);
#ifdef WITNESS
witness_display_spinlock(&m->mtx_object,
mtx_owner(m));
#endif
panic("spin lock held too long");
}
#ifdef __i386__
ia32_pause();
#endif

12
sys/kern/subr_turnstile.c
View File

@ -690,12 +690,18 @@ _mtx_lock_spin(struct mtx *m, int opts, const char *file, int line)
if (i < 60000000)
DELAY(1);
#ifdef DDB
else if (!db_active)
else if (!db_active) {
#else
else
else {
#endif
panic("spin lock %s held by %p for > 5 seconds",
printf("spin lock %s held by %p for > 5 seconds\n",
m->mtx_object.lo_name, (void *)m->mtx_lock);
#ifdef WITNESS
witness_display_spinlock(&m->mtx_object,
mtx_owner(m));
#endif
panic("spin lock held too long");
}
#ifdef __i386__
ia32_pause();
#endif