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authorOleg Nesterov <oleg@redhat.com>2009-06-11 13:12:55 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 11:26:38 -0700
commitb415c49a864dab8ee90713833d642dd461eccae9 (patch)
treef5e763afdab9a43ff632993d7be49e73d8a6df6c /kernel/slow-work.c
parent6adc74b7d03c06a8e15d51fe33c3d924ada9271a (diff)
downloadlinux-2.6.34-ux500-b415c49a864dab8ee90713833d642dd461eccae9.tar.gz
slow_work_thread() should do the exclusive wait
slow_work_thread() sleeps on slow_work_thread_wq without WQ_FLAG_EXCLUSIVE, this means that slow_work_enqueue()->__wake_up(nr_exclusive => 1) wakes up all kslowd threads. This is not what we want, so we change slow_work_thread() to use prepare_to_wait_exclusive() instead. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/slow-work.c')
-rw-r--r--kernel/slow-work.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/slow-work.c b/kernel/slow-work.c
index b28d19135f4..521ed2004d6 100644
--- a/kernel/slow-work.c
+++ b/kernel/slow-work.c
@@ -372,8 +372,8 @@ static int slow_work_thread(void *_data)
vsmax *= atomic_read(&slow_work_thread_count);
vsmax /= 100;
- prepare_to_wait(&slow_work_thread_wq, &wait,
- TASK_INTERRUPTIBLE);
+ prepare_to_wait_exclusive(&slow_work_thread_wq, &wait,
+ TASK_INTERRUPTIBLE);
if (!freezing(current) &&
!slow_work_threads_should_exit &&
!slow_work_available(vsmax) &&