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author | Renato Botelho <renato@netgate.com> | 2016-10-12 11:41:26 -0300 |
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committer | Renato Botelho <renato@netgate.com> | 2016-10-12 11:41:26 -0300 |
commit | cb642130dfc50717bb970a104c44aa7690930a38 (patch) | |
tree | c67f108534217a209198c6b201949ecc73acaba3 /sys/kern/subr_taskqueue.c | |
parent | 5dd7ab172435dc99e1abc1f7d73fd5e720050bbc (diff) | |
parent | cd04fbc5e631c6b3e80a14eb7044c3be35fba2d2 (diff) | |
download | FreeBSD-src-cb642130dfc50717bb970a104c44aa7690930a38.zip FreeBSD-src-cb642130dfc50717bb970a104c44aa7690930a38.tar.gz |
Merge remote-tracking branch 'origin/stable/11' into devel-11
Diffstat (limited to 'sys/kern/subr_taskqueue.c')
-rw-r--r-- | sys/kern/subr_taskqueue.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/kern/subr_taskqueue.c b/sys/kern/subr_taskqueue.c index 5a20148..d380b9c 100644 --- a/sys/kern/subr_taskqueue.c +++ b/sys/kern/subr_taskqueue.c @@ -81,6 +81,7 @@ struct taskqueue { #define TQ_FLAGS_UNLOCKED_ENQUEUE (1 << 2) #define DT_CALLOUT_ARMED (1 << 0) +#define DT_DRAIN_IN_PROGRESS (1 << 1) #define TQ_LOCK(tq) \ do { \ @@ -299,7 +300,11 @@ taskqueue_enqueue_timeout(struct taskqueue *queue, KASSERT(!queue->tq_spin, ("Timeout for spin-queue")); timeout_task->q = queue; res = timeout_task->t.ta_pending; - if (ticks == 0) { + if (timeout_task->f & DT_DRAIN_IN_PROGRESS) { + /* Do nothing */ + TQ_UNLOCK(queue); + res = -1; + } else if (ticks == 0) { taskqueue_enqueue_locked(queue, &timeout_task->t); /* The lock is released inside. */ } else { @@ -559,8 +564,24 @@ taskqueue_drain_timeout(struct taskqueue *queue, struct timeout_task *timeout_task) { + /* + * Set flag to prevent timer from re-starting during drain: + */ + TQ_LOCK(queue); + KASSERT((timeout_task->f & DT_DRAIN_IN_PROGRESS) == 0, + ("Drain already in progress")); + timeout_task->f |= DT_DRAIN_IN_PROGRESS; + TQ_UNLOCK(queue); + callout_drain(&timeout_task->c); taskqueue_drain(queue, &timeout_task->t); + + /* + * Clear flag to allow timer to re-start: + */ + TQ_LOCK(queue); + timeout_task->f &= ~DT_DRAIN_IN_PROGRESS; + TQ_UNLOCK(queue); } static void |