This is a note to let you know that I've just added the patch titled
md: Fix removal of extra drives when converting RAID6 to RAID5
to the 2.6.36-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-fix-removal-of-extra-drives-when-converting-raid6-to-raid5.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From bf2cb0dab8c97f00a71875d9b13dbac17a2f47ca Mon Sep 17 00:00:00 2001
From: NeilBrown <[email protected]>
Date: Fri, 14 Jan 2011 09:14:34 +1100
Subject: md: Fix removal of extra drives when converting RAID6 to RAID5
From: NeilBrown <[email protected]>
commit bf2cb0dab8c97f00a71875d9b13dbac17a2f47ca upstream.
When a RAID6 is converted to a RAID5, the extra drive should
be discarded. However it isn't due to a typo in a comparison.
This bug was introduced in commit e93f68a1fc6 in 2.6.35-rc4
and is suitable for any -stable since than.
As the extra drive is not removed, the 'degraded' counter is wrong and
so the RAID5 will not respond correctly to a subsequent failure.
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/md.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3111,7 +3111,7 @@ level_store(mddev_t *mddev, const char *
char nm[20];
if (rdev->raid_disk < 0)
continue;
- if (rdev->new_raid_disk > mddev->raid_disks)
+ if (rdev->new_raid_disk >= mddev->raid_disks)
rdev->new_raid_disk = -1;
if (rdev->new_raid_disk == rdev->raid_disk)
continue;
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.36/md-fix-removal-of-extra-drives-when-converting-raid6-to-raid5.patch
queue-2.6.36/md-fix-regression-resulting-in-delays-in-clearing-bits-in-a-bitmap.patch
queue-2.6.36/md_make_request-don-t-touch-the-bio-after-calling-make_request.patch
queue-2.6.36/md-fix-regression-with-re-adding-devices-to-arrays-with-no-metadata.patch
queue-2.6.36/md-ensure-no-io-request-to-get-md-device-before-it-is-properly-initialised.patch
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