From 93588e2284b6be1873cc0bb7fbf0947bdbf72830 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Tue, 15 Nov 2005 00:09:12 -0800
Subject: [PATCH] [PATCH] md: make md threads interruptible again
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>
---
drivers/md/md.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index a9f032e341cbbc..f3fed662f32ea6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -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);
--
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