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authorJonathan Brassow <jbrassow@redhat.com>2008-10-10 13:36:59 +0100
committerAlasdair G Kergon <agk@redhat.com>2008-10-10 13:36:59 +0100
commitf7c83e2e4783c4f7abe6f3a85a8c5e210f98bc7b (patch)
tree2ea22c54a1eb2db8ad983883751040d884109e76
parent6680073d3ec7c6dbdbf77870bf1fea869767d779 (diff)
dm raid1: kcopyd should stop on error if errors handled
dm-raid1 is setting the 'DM_KCOPYD_IGNORE_ERROR' flag unconditionally when assigning kcopyd work. kcopyd is responsible for copying an assigned section of disk to one or more other disks. The 'DM_KCOPYD_IGNORE_ERROR' flag affects kcopyd in the following way: When not set: kcopyd will immediately stop the copy operation when an error is encountered. When set: kcopyd will try to proceed regardless of errors and try to continue copying any remaining amount. Since dm-raid1 tracks regions of the address space that are (or are not) in sync and it now has the ability to handle these errors, we can safely enable this optimization. This optimization is conditional on whether mirror error handling has been enabled. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-raid1.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index ff05fe893083..29913e42c4ab 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -842,7 +842,9 @@ static int recover(struct mirror_set *ms, struct region *reg)
}
/* hand to kcopyd */
- set_bit(DM_KCOPYD_IGNORE_ERROR, &flags);
+ if (!errors_handled(ms))
+ set_bit(DM_KCOPYD_IGNORE_ERROR, &flags);
+
r = dm_kcopyd_copy(ms->kcopyd_client, &from, ms->nr_mirrors - 1, to,
flags, recovery_complete, reg);