Hello,
last night we had scsi problems and a hardware raid
unit was offlined during heavy i/o. While this happened we got for
about 3 minutes a huge number messages like these
Apr 12 03:36:07 pfs1n14 kernel: [197510.696595] raid5:md7: read error not correctable (sector 2993096568 on sdj2).
I guess the high error rate is responsible for not scheduling other
events - during this time the system was not pingable and in the end
also other devices run into scsi command timeouts causing problems on
these unrelated devices as well.
Signed-off-by: Bernd Schubert <bernd-schubert@xxxxxx>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index b162b83..3c82dfb 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1141,10 +1141,12 @@ static void raid5_end_read_request(struct bio * bi, int error)
set_bit(R5_UPTODATE, &sh->dev[i].flags);
if (test_bit(R5_ReadError, &sh->dev[i].flags)) {
rdev = conf->disks[i].rdev;
- printk(KERN_INFO "raid5:%s: read error corrected (%lu sectors at %llu on %s)\n",
- mdname(conf->mddev), STRIPE_SECTORS,
- (unsigned long long)(sh->sector + rdev->data_offset),
- bdevname(rdev->bdev, b));
+ if (printk_ratelimit())
+ printk(KERN_INFO "raid5:%s: read error corrected"
+ " (%lu sectors at %llu on %s)\n",
+ mdname(conf->mddev), STRIPE_SECTORS,
+ (unsigned long long)(sh->sector + rdev->data_offset),
+ bdevname(rdev->bdev, b));
clear_bit(R5_ReadError, &sh->dev[i].flags);
clear_bit(R5_ReWrite, &sh->dev[i].flags);
}
@@ -1157,12 +1159,13 @@ static void raid5_end_read_request(struct bio * bi, int error)
clear_bit(R5_UPTODATE, &sh->dev[i].flags);
atomic_inc(&rdev->read_errors);
- if (conf->mddev->degraded)
+ if (conf->mddev->degraded && printk_ratelimit())
printk(KERN_WARNING "raid5:%s: read error not correctable (sector %llu on %s).\n",
mdname(conf->mddev),
(unsigned long long)(sh->sector + rdev->data_offset),
bdn);
- else if (test_bit(R5_ReWrite, &sh->dev[i].flags))
+ else if (test_bit(R5_ReWrite, &sh->dev[i].flags) &&
+ printk_ratelimit())
/* Oh, no!!! */
printk(KERN_WARNING "raid5:%s: read error NOT corrected!! (sector %llu on %s).\n",
mdname(conf->mddev),
--
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