From: NeilBrown <neilb@suse.de>
To: linux-raid@vger.kernel.org
Subject: [md PATCH 20/36] md/raid5. Don't write to known bad block on doubtful devices.
Date: Thu, 21 Jul 2011 12:58:49 +1000 [thread overview]
Message-ID: <20110721025849.8422.68502.stgit@notabene.brown> (raw)
In-Reply-To: <20110721024556.8422.99443.stgit@notabene.brown>
If a device has seen write errors, don't write to any known
bad blocks on that device.
Signed-off-by: NeilBrown <neilb@suse.de>
---
drivers/md/raid5.c | 31 ++++++++++++++++++++++++++++++-
1 files changed, 30 insertions(+), 1 deletions(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 54e89d1..33ae4e2 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -526,6 +526,36 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
+ /* We have already checked bad blocks for reads. Now
+ * need to check for writes.
+ */
+ while ((rw & WRITE) && rdev &&
+ test_bit(WriteErrorSeen, &rdev->flags)) {
+ sector_t first_bad;
+ int bad_sectors;
+ int bad = is_badblock(rdev, sh->sector, STRIPE_SECTORS,
+ &first_bad, &bad_sectors);
+ if (!bad)
+ break;
+
+ if (bad < 0) {
+ set_bit(BlockedBadBlocks, &rdev->flags);
+ if (!conf->mddev->external &&
+ conf->mddev->flags) {
+ /* It is very unlikely, but we might
+ * still need to write out the
+ * bad block log - better give it
+ * a chance*/
+ md_check_recovery(conf->mddev);
+ }
+ md_wait_for_blocked_rdev(rdev, conf->mddev);
+ } else {
+ /* Acknowledged bad block - skip the write */
+ rdev_dec_pending(rdev, conf->mddev);
+ rdev = NULL;
+ }
+ }
+
if (rdev) {
if (s->syncing || s->expanding || s->expanded)
md_sync_acct(rdev->bdev, STRIPE_SECTORS);
@@ -3317,7 +3347,6 @@ finish:
ops_run_io(sh, &s);
-
if (s.dec_preread_active) {
/* We delay this until after ops_run_io so that if make_request
* is waiting on a flush, it won't continue until the writes
next prev parent reply other threads:[~2011-07-21 2:58 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-21 2:58 [md PATCH 00/36] md patches for 3.1 - part 2: bad block logs NeilBrown
2011-07-21 2:58 ` [md PATCH 02/36] md/bad-block-log: add sysfs interface for accessing bad-block-log NeilBrown
2011-07-22 15:43 ` Namhyung Kim
2011-07-26 2:29 ` NeilBrown
2011-07-26 5:17 ` Namhyung Kim
2011-07-26 8:48 ` Namhyung Kim
2011-07-26 15:03 ` [PATCH v2] md: add documentation for bad block log Namhyung Kim
2011-07-27 1:05 ` [md PATCH 02/36] md/bad-block-log: add sysfs interface for accessing bad-block-log NeilBrown
2011-07-21 2:58 ` [md PATCH 01/36] md: beginnings of bad block management NeilBrown
2011-07-22 15:03 ` Namhyung Kim
2011-07-26 2:26 ` NeilBrown
2011-07-26 5:17 ` Namhyung Kim
2011-07-22 16:52 ` Namhyung Kim
2011-07-26 3:20 ` NeilBrown
2011-07-21 2:58 ` [md PATCH 04/36] md: load/store badblock list from v1.x metadata NeilBrown
2011-07-22 16:34 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 03/36] md: don't allow arrays to contain devices with bad blocks NeilBrown
2011-07-22 15:47 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 05/36] md: Disable bad blocks and v0.90 metadata NeilBrown
2011-07-22 17:02 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 07/36] md/raid1: avoid reading known bad blocks during resync NeilBrown
2011-07-26 14:25 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 14/36] md/raid1: record badblocks found during resync etc NeilBrown
2011-07-27 15:39 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 08/36] md: add 'write_error' flag to component devices NeilBrown
2011-07-26 15:22 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 13/36] md/raid1: Handle write errors by updating badblock log NeilBrown
2011-07-27 15:28 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 06/36] md/raid1: avoid reading from known bad blocks NeilBrown
2011-07-26 14:06 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 11/36] md/raid1: clear bad-block record when write succeeds NeilBrown
2011-07-27 5:05 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 09/36] md: make it easier to wait for bad blocks to be acknowledged NeilBrown
2011-07-26 16:04 ` Namhyung Kim
2011-07-27 1:18 ` NeilBrown
2011-07-21 2:58 ` [md PATCH 12/36] md/raid1: store behind-write pages in bi_vecs NeilBrown
2011-07-27 15:16 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 10/36] md/raid1: avoid writing to known-bad blocks on known-bad drives NeilBrown
2011-07-27 4:09 ` Namhyung Kim
2011-07-27 4:19 ` NeilBrown
2011-07-21 2:58 ` [md PATCH 23/36] md/raid10: Split handle_read_error out from raid10d NeilBrown
2011-07-21 2:58 ` [md PATCH 19/36] md/raid5: write errors should be recorded as bad blocks if possible NeilBrown
2011-07-21 2:58 ` [md PATCH 24/36] md/raid10: avoid reading from known bad blocks - part 1 NeilBrown
2011-07-21 2:58 ` [md PATCH 16/36] md/raid1: factor several functions out or raid1d() NeilBrown
2011-07-27 15:55 ` Namhyung Kim
2011-07-28 1:39 ` NeilBrown
2011-07-21 2:58 ` [md PATCH 17/36] md/raid5: avoid reading from known bad blocks NeilBrown
2011-07-21 2:58 ` [md PATCH 15/36] md/raid1: improve handling of read failure during recovery NeilBrown
2011-07-27 15:45 ` Namhyung Kim
2011-07-21 2:58 ` [md PATCH 21/36] md/raid5: Clear bad blocks on successful write NeilBrown
2011-07-21 2:58 ` NeilBrown [this message]
2011-07-21 2:58 ` [md PATCH 22/36] md/raid10: simplify/reindent some loops NeilBrown
2011-07-21 2:58 ` [md PATCH 18/36] md/raid5: use bad-block log to improve handling of uncorrectable read errors NeilBrown
2011-07-21 2:58 ` [md PATCH 27/36] md/raid10: avoid reading known bad blocks during resync/recovery NeilBrown
2011-07-21 2:58 ` [md PATCH 29/36] md/raid10: avoid writing to known bad blocks on known bad drives NeilBrown
2011-07-21 2:58 ` [md PATCH 33/36] md/raid10: record bad blocks due to write errors during resync/recovery NeilBrown
2011-07-21 2:58 ` [md PATCH 30/36] md/raid10: clear bad-block record when write succeeds NeilBrown
2011-07-21 2:58 ` [md PATCH 28/36] md/raid10 record bad blocks as needed during recovery NeilBrown
2011-07-21 2:58 ` [md PATCH 25/36] md/raid10: avoid reading from known bad blocks - part 2 NeilBrown
2011-07-21 2:58 ` [md PATCH 34/36] md/raid10: simplify read error handling during recovery NeilBrown
2011-07-21 2:58 ` [md PATCH 31/36] md/raid10: Handle write errors by updating badblock log NeilBrown
2011-07-21 2:58 ` [md PATCH 32/36] md/raid10: attempt to fix read errors during resync/check NeilBrown
2011-07-21 2:58 ` [md PATCH 26/36] md/raid10 - avoid reading from known bad blocks - part 3 NeilBrown
2011-07-21 2:58 ` [md PATCH 36/36] md/raid10: handle further errors during fix_read_error better NeilBrown
2011-07-21 2:58 ` [md PATCH 35/36] md/raid10: Handle read errors during recovery better NeilBrown
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