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    Subject[086/107] md: avoid endless recovery loop when waiting for fail device to complete.
    2.6.39-stable review patch.  If anyone has any objections, please let us know.


    From: NeilBrown <>

    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

    This bug was introduced in 2.6.26 so that patch is suitable for any
    kernel since then.

    Reported-by: Jim Paradis <>
    Signed-off-by: NeilBrown <>
    Signed-off-by: Greg Kroah-Hartman <>

    drivers/md/md.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/md/md.c
    +++ b/drivers/md/md.c
    @@ -7062,6 +7062,7 @@ 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))
    if (rdev->raid_disk < 0

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      Last update: 2011-07-08 07:13    [W:0.021 / U:14.272 seconds]
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