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authorNeilBrown <neilb@suse.de>2009-12-14 12:50:06 +1100
committerNeilBrown <neilb@suse.de>2009-12-14 12:51:41 +1100
commit93be75ffde6dfd1ad17cc3ff1dbd135bd711baf4 (patch)
tree56006efccad176da1b806978faf60d77c817e6ac /drivers/md
parentaa98aa31987ad9831711ae71ea2270228ab62532 (diff)
downloadlinux-93be75ffde6dfd1ad17cc3ff1dbd135bd711baf4.tar.bz2
md: integrate spares into array at earliest opportunity.
As v1.x metadata can record that a member of the array is not completely recovered, it make sense to record that a spare has become a regular member of the array at the earliest opportunity. So remove the tests on "recovery_offset > 0" in super_1_sync as they really aren't needed, and schedule a metadata update immediately after adding spares to a degraded array. This means that if a crash happens immediately after a recovery starts, the new device will be included in the array and recovery will continue from wherever it was up to. Previously this didn't happen unless recovery was at least 1/16 of the way through. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 08564375d6b5..68a8a29a9012 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1508,12 +1508,10 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
if (rdev->raid_disk >= 0 &&
!test_bit(In_sync, &rdev->flags)) {
- if (rdev->recovery_offset > 0) {
- sb->feature_map |=
- cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET);
- sb->recovery_offset =
- cpu_to_le64(rdev->recovery_offset);
- }
+ sb->feature_map |=
+ cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET);
+ sb->recovery_offset =
+ cpu_to_le64(rdev->recovery_offset);
}
if (mddev->reshape_position != MaxSector) {
@@ -1547,7 +1545,7 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
sb->dev_roles[i] = cpu_to_le16(0xfffe);
else if (test_bit(In_sync, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
- else if (rdev2->raid_disk >= 0 && rdev2->recovery_offset > 0)
+ else if (rdev2->raid_disk >= 0)
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
else
sb->dev_roles[i] = cpu_to_le16(0xffff);
@@ -6786,6 +6784,7 @@ static int remove_and_add_spares(mddev_t *mddev)
nm, mdname(mddev));
spares++;
md_new_event(mddev);
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
} else
break;
}