This is a note to let you know that I've just added the patch titled
md: avoid endless recovery loop when waiting for fail device
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
md-avoid-endless-recovery-loop-when-waiting-for-fail-device.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From 4274215d24633df7302069e51426659d4759c5ed Mon Sep 17 00:00:00 2001
From: NeilBrown <[email protected]>
Date: Tue, 28 Jun 2011 16:59:42 +1000
Subject: md: avoid endless recovery loop when waiting for fail device
to complete.
From: NeilBrown <[email protected]>
commit 4274215d24633df7302069e51426659d4759c5ed upstream.
If a device fails in a way that causes pending request to take a while
to complete, md will not be able to immediately remove it from the
array in remove_and_add_spares.
It will then incorrectly look like a spare device and md will try to
recover it even though it is failed.
This leads to a recovery process starting and instantly aborting over
and over again.
We should check if the device is faulty before considering it to be a
spare. This will avoid trying to start a recovery that cannot
proceed.
This bug was introduced in 2.6.26 so that patch is suitable for any
kernel since then.
Reported-by: Jim Paradis <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/md.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6623,6 +6623,7 @@ static int remove_and_add_spares(mddev_t
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (rdev->raid_disk >= 0 &&
!test_bit(In_sync, &rdev->flags) &&
+ !test_bit(Faulty, &rdev->flags) &&
!test_bit(Blocked, &rdev->flags))
spares++;
if (rdev->raid_disk < 0
Patches currently in longterm-queue-2.6.32 which might be from [email protected] are
/home/gregkh/linux/longterm/longterm-queue-2.6.32/queue-2.6.32/md-avoid-endless-recovery-loop-when-waiting-for-fail-device.patch
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