src/patches/suse-2.6.27.31/patches.fixes/0003-md-don-t-retry-recovery-of-raid1-that-fails-due-to-e.patch

   1 From 4044ba58dd15cb01797c4fd034f39ef4a75f7cc3 Mon Sep 17 00:00:00 2001
   2 From: NeilBrown <neilb@suse.de>
   3 Date: Fri, 9 Jan 2009 08:31:11 +1100
   4 Subject: [PATCH] md: don't retry recovery of raid1 that fails due to error on source drive.
   5
   6 If a raid1 has only one working drive and it has a sector which
   7 gives an error on read, then an attempt to recover onto a spare will
   8 fail, but as the single remaining drive is not removed from the
   9 array, the recovery will be immediately re-attempted, resulting
  10 in an infinite recovery loop.
  11
  12 So detect this situation and don't retry recovery once an error
  13 on the lone remaining drive is detected.
  14
  15 Allow recovery to be retried once every time a spare is added
  16 in case the problem wasn't actually a media error.
  17
  18 Signed-off-by: NeilBrown <neilb@suse.de>
  19 ---
  20  drivers/md/md.c |    3 +++
  21  1 file changed, 3 insertions(+)
  22
  23 --- linux-2.6.27-SLE11_BRANCH.orig/drivers/md/md.c
  24 +++ linux-2.6.27-SLE11_BRANCH/drivers/md/md.c
  25 @@ -1512,6 +1512,9 @@ static int bind_rdev_to_array(mdk_rdev_t
  26         list_add_rcu(&rdev->same_set, &mddev->disks);
  27         bd_claim_by_disk(rdev->bdev, rdev->bdev->bd_holder, mddev->gendisk);
  28         md_integrity_check(rdev, mddev);
  29 +
  30 +       /* May as well allow recovery to be retried once */
  31 +       clear_bit(MD_RECOVERY_DISABLED, &mddev->recovery);
  32         return 0;
  33
  34   fail: