diff options
Diffstat (limited to 'sys/kern/subr_sleepqueue.c')
-rw-r--r-- | sys/kern/subr_sleepqueue.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/sys/kern/subr_sleepqueue.c b/sys/kern/subr_sleepqueue.c index a0496bd..5df74d0 100644 --- a/sys/kern/subr_sleepqueue.c +++ b/sys/kern/subr_sleepqueue.c @@ -122,8 +122,8 @@ struct sleepqueue { LIST_ENTRY(sleepqueue) sq_hash; /* (c) Chain and free list. */ LIST_HEAD(, sleepqueue) sq_free; /* (c) Free queues. */ void *sq_wchan; /* (c) Wait channel. */ -#ifdef INVARIANTS int sq_type; /* (c) Queue type. */ +#ifdef INVARIANTS struct lock_object *sq_lock; /* (c) Associated lock. */ #endif }; @@ -317,7 +317,6 @@ sleepq_add(void *wchan, struct lock_object *lock, const char *wmesg, int flags, ("thread's sleep queue has a non-empty free list")); KASSERT(sq->sq_wchan == NULL, ("stale sq_wchan pointer")); sq->sq_lock = lock; - sq->sq_type = flags & SLEEPQ_TYPE; #endif #ifdef SLEEPQUEUE_PROFILING sc->sc_depth++; @@ -330,6 +329,7 @@ sleepq_add(void *wchan, struct lock_object *lock, const char *wmesg, int flags, sq = td->td_sleepqueue; LIST_INSERT_HEAD(&sc->sc_queues, sq, sq_hash); sq->sq_wchan = wchan; + sq->sq_type = flags & SLEEPQ_TYPE; } else { MPASS(wchan == sq->sq_wchan); MPASS(lock == sq->sq_lock); @@ -669,6 +669,28 @@ sleepq_timedwait_sig(void *wchan, int pri) } /* + * Returns the type of sleepqueue given a waitchannel. + */ +int +sleepq_type(void *wchan) +{ + struct sleepqueue *sq; + int type; + + MPASS(wchan != NULL); + + sleepq_lock(wchan); + sq = sleepq_lookup(wchan); + if (sq == NULL) { + sleepq_release(wchan); + return (-1); + } + type = sq->sq_type; + sleepq_release(wchan); + return (type); +} + +/* * Removes a thread from a sleep queue and makes it * runnable. */ @@ -1176,8 +1198,8 @@ DB_SHOW_COMMAND(sleepq, db_show_sleepqueue) return; found: db_printf("Wait channel: %p\n", sq->sq_wchan); -#ifdef INVARIANTS db_printf("Queue type: %d\n", sq->sq_type); +#ifdef INVARIANTS if (sq->sq_lock) { lock = sq->sq_lock; db_printf("Associated Interlock: %p - (%s) %s\n", lock, |