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[PATCH] md: make md threads interruptible again

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Despite the fact that md threads don't need to be signalled, and won't
respond to signals anyway, we need to have an 'interruptible' wait, else
they stay in 'D' state and add to the load average.

(akpm: the signal_pending() test is unneeded - we'll fix that up in the next
round.  For now, leave it there because that's how the code used to be).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-11-15 00:09:12 -08:00 committed by Linus Torvalds
parent e8a0033451
commit 93588e2284
1 changed files with 13 additions and 4 deletions
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17
drivers/md/md.c
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@ -3437,10 +3437,19 @@ static int md_thread(void * arg)
allow_signal(SIGKILL);
while (!kthread_should_stop()) {
wait_event_timeout(thread->wqueue,
test_bit(THREAD_WAKEUP, &thread->flags)
|| kthread_should_stop(),
thread->timeout);
/* We need to wait INTERRUPTIBLE so that
* we don't add to the load-average.
* That means we need to be sure no signals are
* pending
*/
if (signal_pending(current))
flush_signals(current);
wait_event_interruptible_timeout
(thread->wqueue,
test_bit(THREAD_WAKEUP, &thread->flags)
|| kthread_should_stop(),
thread->timeout);
try_to_freeze();
clear_bit(THREAD_WAKEUP, &thread->flags);