unimore/kernel-hacking-2024-linux-steffo
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bcache: Fix a dumb CPU spinning bug in writeback

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schedule_timeout() != schedule_timeout_uninterruptible()

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kent Overstreet 2013-09-23 23:17:33 -07:00 committed by Linus Torvalds
parent 1394d6761b
commit 79e3dab90d
1 changed files with 1 additions and 2 deletions
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3
drivers/md/bcache/writeback.c
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@ -397,8 +397,7 @@ static void read_dirty(struct closure *cl)
if (delay > 0 &&
(KEY_START(&w->key) != dc->last_read ||
jiffies_to_msecs(delay) > 50))
while (delay)
delay = schedule_timeout(delay);
delay = schedule_timeout_uninterruptible(delay);
dc->last_read = KEY_OFFSET(&w->key);