From 8dbed5cebdf6796bf2618457b3653cf820934366 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Thu, 28 Jul 2011 11:39:24 +1000
Subject: [PATCH] md/raid10 - avoid reading from known bad blocks - part 3
When attempting to repair a read error, don't read from
devices with a known bad block.
As we are only reading PAGE_SIZE blocks, we don't try to
narrow down to smaller regions in the hope that only part of this
page is bad - it isn't worth the effort.
Signed-off-by: NeilBrown <neilb@suse.de>
---
drivers/md/raid10.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 37801d6..a5ecea2 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1594,10 +1594,15 @@ static void fix_read_error(conf_t *conf, mddev_t *mddev, r10bio_t *r10_bio)
rcu_read_lock();
do {
+ sector_t first_bad;
+ int bad_sectors;
+
d = r10_bio->devs[sl].devnum;
rdev = rcu_dereference(conf->mirrors[d].rdev);
if (rdev &&
- test_bit(In_sync, &rdev->flags)) {
+ test_bit(In_sync, &rdev->flags) &&
+ is_badblock(rdev, r10_bio->devs[sl].addr + sect, s,
+ &first_bad, &bad_sectors) == 0) {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
success = sync_page_io(rdev,
--
1.9.1