On 11/06/2017 09:14 AM, Artur Paszkiewicz wrote: > On 11/03/2017 08:58 PM, Chris Walker wrote: >> Hello, >> I was looking at this again today and it appears that with this change, error handling no longer works correctly in RAID10 (I haven't checked the other levels yet). Without a BBL configured, an error cycles through fix_read_error until max_read_errors is exceeded, and only then is the drive kicked out of the array. For example, if I inject errors in response to both read and write commands at sector 16392 of /dev/sda, logs in response to a read of the corresponding md0 sector look like: >> >> (many repeats) >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: unable to read back corrected sectors (8 sectors at 16392 on sda) >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: sda: failing drive >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: read correction write failed (8 sectors at 16392 on sda) >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: sda: failing drive >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: unable to read back corrected sectors (8 sectors at 16392 on sda) >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: sda: failing drive >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: sda: Raid device exceeded read_error threshold [cur 21:max 20] >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: sda: Failing raid device >> Oct 27 16:15:16 c1 kernel: md/raid10:md0: Disk failure on sda, disabling device. >> >> Previously, the drive would have been failed out of the array by the call of md_error at the end of r10_sync_page_io. >> >> Is there an appetite for a patch that takes the easy way out by reverting to the previous behavior with changes like >> >> - if (!rdev_set_badblocks(rdev, sector, sectors, 0)) >> + if (!rdev_set_badblocks(rdev, sector, sectors, 0) || rdev->badblocks.shift < 0) > > Hi, > > Some time ago I sent a patch that fixed this issue but now I see that it > never got applied: > https://marc.info/?l=linux-block&m=145986120124345&w=2. I'll resend it > and hopefully it gets applied this time. OK, never mind. Someone already did this: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/block/badblocks.c?h=next-20171106&id=39b4954c0a1556f8f7f1fdcf59a227117fcd8a0b Thanks, Artur -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
