diff options
| author | David Gwynne <dlg@cvs.openbsd.org> | 2015-11-19 13:19:25 +0000 |
|---|---|---|
| committer | David Gwynne <dlg@cvs.openbsd.org> | 2015-11-19 13:19:25 +0000 |
| commit | 80012f834ed619eae8c5e7ef5f535563eabf18a7 (patch) | |
| tree | 2ef245c4a98dbec3b4891a6ffa304e978f57febe /sys | |
| parent | 5b6a3d525b50d140f49ca5ca0ca9a973baf78a00 (diff) | |
dont try and wakeup other threads to handle pending work when we
know there's only one thread in the taskq. wakeups are much more
expensive than a simple compare.
from haesbart
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/kern/kern_task.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/kern_task.c b/sys/kern/kern_task.c index 8c736bd9679..15ca0486ec0 100644 --- a/sys/kern/kern_task.c +++ b/sys/kern/kern_task.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_task.c,v 1.14 2015/02/09 03:15:41 dlg Exp $ */ +/* $OpenBSD: kern_task.c,v 1.15 2015/11/19 13:19:24 dlg Exp $ */ /* * Copyright (c) 2013 David Gwynne <dlg@openbsd.org> @@ -264,7 +264,7 @@ taskq_next_work(struct taskq *tq, struct task *work, sleepfn tqsleep) next = TAILQ_FIRST(&tq->tq_worklist); mtx_leave(&tq->tq_mtx); - if (next != NULL) + if (next != NULL && tq->tq_nthreads > 1) wakeup_one(tq); return (1); |