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Groups > linux.kernel > #1427077
| From | Mike Snitzer <snitzer@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices |
| Date | 2016-06-20 23:50 +0200 |
| Message-ID | <rMfeV-5bZ-7@gated-at.bofh.it> (permalink) |
| References | <rJIGt-4a0-1@gated-at.bofh.it> <rJIZQ-4pp-9@gated-at.bofh.it> <rMc7n-3jw-11@gated-at.bofh.it> <rMdmO-41g-11@gated-at.bofh.it> <rMdmO-41g-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Jun 20 2016 at 3:40pm -0400,
Mike Snitzer <snitzer@redhat.com> wrote:
> # dd if=/dev/zero of=/mnt/dax/meh bs=1024K oflag=direct
> [11729.754671] XFS (dm-4): Metadata corruption detected at xfs_agf_read_verify+0x70/0x120 [xfs], xfs_agf block 0x45a808
> [11729.766423] XFS (dm-4): Unmount and run xfs_repair
> [11729.771774] XFS (dm-4): First 64 bytes of corrupted metadata buffer:
> [11729.778869] ffff8800b8038000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> [11729.788582] ffff8800b8038010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> [11729.798293] ffff8800b8038020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> [11729.808002] ffff8800b8038030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
> [11729.817715] XFS (dm-4): metadata I/O error: block 0x45a808 ("xfs_trans_read_buf_map") error 117 numblks 8
>
> When this XFS corruption occurs corruption then also manifests in lvm2's
> metadata:
>
> # vgremove pmem
> Do you really want to remove volume group "pmem" containing 1 logical volumes? [y/n]: y
> Do you really want to remove active logical volume lv? [y/n]: y
> Incorrect metadata area header checksum on /dev/pmem0p1 at offset 4096
> WARNING: Failed to write an MDA of VG pmem.
> Incorrect metadata area header checksum on /dev/pmem0p2 at offset 4096
> WARNING: Failed to write an MDA of VG pmem.
> Failed to write VG pmem.
> Incorrect metadata area header checksum on /dev/pmem0p2 at offset 4096
> Incorrect metadata area header checksum on /dev/pmem0p1 at offset 4096
>
> If I don't use XFS, and only issue IO directly to the /dev/pmem/lv, I
> don't see this corruption.
I did the same test with ext4 instead of xfs and it resulted in the same
type of systemic corruption (lvm2 metadata corrupted too):
[12816.407147] EXT4-fs (dm-4): DAX enabled. Warning: EXPERIMENTAL, use at your own risk
[12816.416123] EXT4-fs (dm-4): mounted filesystem with ordered data mode. Opts: dax
[12816.766855] EXT4-fs error (device dm-4): ext4_mb_generate_buddy:758: group 9, block bitmap and bg descriptor inconsistent: 32768 vs 32395 free clusters
[12816.782016] EXT4-fs error (device dm-4): ext4_mb_generate_buddy:758: group 10, block bitmap and bg descriptor inconsistent: 32768 vs 16384 free clusters
[12816.797491] JBD2: Spotted dirty metadata buffer (dev = dm-4, blocknr = 0). There's a risk of filesystem corruption in case of system crash.
# vgremove pmem
Do you really want to remove volume group "pmem" containing 1 logical volumes? [y/n]: y
Do you really want to remove active logical volume lv? [y/n]: y
Incorrect metadata area header checksum on /dev/pmem0p1 at offset 4096
WARNING: Failed to write an MDA of VG pmem.
Incorrect metadata area header checksum on /dev/pmem0p2 at offset 4096
WARNING: Failed to write an MDA of VG pmem.
Failed to write VG pmem.
Incorrect metadata area header checksum on /dev/pmem0p2 at offset 4096
Incorrect metadata area header checksum on /dev/pmem0p1 at offset 4096
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[PATCH 0/6] Support DAX for device-mapper dm-linear devices Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 1/6] genhd: Add GENHD_FL_DAX to gendisk flags Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 4/6] dm-linear: Add linear_direct_access() Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 6/6] dm: Enable DAX support for mapper device Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 3/6] dm: Add dm_blk_direct_access() for mapped device Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 2/6] block: Check GENHD_FL_DAX for DAX capability Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
[PATCH 5/6] dm, dm-linear: Add dax_supported to dm_target Toshi Kani <toshi.kani@hpe.com> - 2016-06-14 00:40 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-14 01:00 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-20 20:30 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-20 21:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-20 23:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 00:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-21 00:40 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-21 15:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 18:00 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 18:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-21 18:30 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-21 18:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 19:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 19:00 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-21 20:30 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-22 19:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-22 21:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-22 22:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-23 00:40 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-23 01:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-21 00:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-20 23:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-14 01:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-14 02:00 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-14 02:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-14 09:40 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Jeff Moyer <jmoyer@redhat.com> - 2016-06-14 16:00 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-14 17:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-14 20:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Jeff Moyer <jmoyer@redhat.com> - 2016-06-14 22:20 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-15 03:50 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Dan Williams <dan.j.williams@intel.com> - 2016-06-15 04:10 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer <snitzer@redhat.com> - 2016-06-15 04:40 +0200
Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices "Kani, Toshimitsu" <toshi.kani@hpe.com> - 2016-06-14 18:00 +0200
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