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| author | NeilBrown <neilb@suse.de> | 2009-12-01 17:30:59 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-12-01 17:30:59 +1100 |
| commit | d0e260782c3702a009645c3caa02e381dab8798b (patch) | |
| tree | 588f7776216df124d9372c7ced833b0bfb6d0a7f | |
| parent | a9366e61b03f55a6e009e687ad10e706714c9907 (diff) | |
| download | linux-d0e260782c3702a009645c3caa02e381dab8798b.tar.gz linux-d0e260782c3702a009645c3caa02e381dab8798b.tar.bz2 linux-d0e260782c3702a009645c3caa02e381dab8798b.zip | |
md: revert incorrect fix for read error handling in raid1.
commit 4706b349f was a forward port of a fix that was needed
for SLES10. But in fact it is not needed in mainline because
the earlier commit dd00a99e7a fixes the same problem in a
better way.
Further, this commit introduces a bug in the way it interacts with
the automatic read-error-correction. If, after a read error is
successfully corrected, the same disk is chosen to re-read - the
re-read won't be attempted but an error will be returned instead.
After reverting that commit, there is the possibility that a
read error on a read-only array (where read errors cannot
be corrected as that requires a write) will repeatedly read the same
device and continue to get an error.
So in the "Array is readonly" case, fail the drive immediately on
a read error.
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
| -rw-r--r-- | drivers/md/raid1.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index a053423785c9..e07ce2e033a9 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1650,11 +1650,12 @@ static void raid1d(mddev_t *mddev) r1_bio->sector, r1_bio->sectors); unfreeze_array(conf); - } + } else + md_error(mddev, + conf->mirrors[r1_bio->read_disk].rdev); bio = r1_bio->bios[r1_bio->read_disk]; - if ((disk=read_balance(conf, r1_bio)) == -1 || - disk == r1_bio->read_disk) { + if ((disk=read_balance(conf, r1_bio)) == -1) { printk(KERN_ALERT "raid1: %s: unrecoverable I/O" " read error for block %llu\n", bdevname(bio->bi_bdev,b), |