]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
md: Allow read error in a single drive raid1 to be passed up.
authorNeilBrown <neilb@suse.de>
Fri, 6 Feb 2009 04:06:47 +0000 (15:06 +1100)
committerNeilBrown <neilb@suse.de>
Fri, 6 Feb 2009 04:06:47 +0000 (15:06 +1100)
commit4706b349f4a8312d31b3d0cf61fe721699356920
tree86c0ee896722e45e324a97b704c0419fbb968d4a
parenteda58a85ec3fc05855a26654d97a2b53f0e715b9
md: Allow read error in a single drive raid1 to be passed up.

If a raid1 only has a single working device and gets a read error,
we choose to simply return that error up to the filesystem (or whatever)
rather than failing the whole array.

However the codes doesn't quite do that.  We attempt a readbalance
which allocates the same drive, so we retry the read - indefinitely.

Instead:  If read_balance in the error case chooses the same drive that just
failed, treat it as a failure and don't retry.

Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid1.c