Re: need help how to debug xfs crash issue xfs_iunlink_remove: xfs_inotobp() returned error 22

[符永涛 <yongtaofu@xxxxxxxxx>]

Hi Brian,

Sorry but when I execute the script it says:
WARNING: cannot find module xfs debuginfo: No DWARF information found
semantic error: no match while resolving probe point module("xfs").function("xfs_iunlink")

uname -a
2.6.32-279.el6.x86_64

kernel debuginfo has been installed.

Where can I find the correct xfs debuginfo?

Thank you for your help.

2013/4/12 Brian Foster <bfoster@xxxxxxxxxx>

On 04/11/2013 03:11 PM, 符永涛 wrote:
> It happens tonight again on one of our servers, how to debug the root
> cause? Thank you.
>

Hi,

I've attached a system tap script (stap -v xfs.stp) that should
hopefully print out a bit more data should the issue happen again. Do
you have a small enough number of nodes (or predictable enough pattern)
that you could run this on the nodes that tend to fail and collect the
output?

Also, could you collect an xfs_metadump of the filesystem in question
and make it available for download and analysis somewhere? I believe the
ideal approach is to mount/umount the filesystem first to replay the log
before collecting a metadump, but somebody could correct me on that (to
be safe, you could collect multiple dumps: pre-mount and post-mount).

Could you also describe your workload a little bit? Thanks.

Brian

> Apr 12 02:32:10 cqdx kernel: XFS (sdb): xfs_iunlink_remove:
> xfs_inotobp() returned error 22.
> Apr 12 02:32:10 cqdx kernel: XFS (sdb): xfs_inactive: xfs_ifree returned
> error 22
> Apr 12 02:32:10 cqdx kernel: XFS (sdb): xfs_do_force_shutdown(0x1)
> called from line 1184 of file fs/xfs/xfs_vnodeops.c.  Return address =
> 0xffffffffa02ee20a
> Apr 12 02:32:10 cqdx kernel: XFS (sdb): I/O Error Detected. Shutting
> down filesystem
> Apr 12 02:32:10 cqdx kernel: XFS (sdb): Please umount the filesystem and
> rectify the problem(s)
> Apr 12 02:32:19 cqdx kernel: XFS (sdb): xfs_log_force: error 5 returned.
> Apr 12 02:32:49 cqdx kernel: XFS (sdb): xfs_log_force: error 5 returned.
> Apr 12 02:33:19 cqdx kernel: XFS (sdb): xfs_log_force: error 5 returned.
> Apr 12 02:33:49 cqdx kernel: XFS (sdb): xfs_log_force: error 5 returned.
>
> xfs_repair -n
>
>
> Phase 7 - verify link counts...
> would have reset inode 20021 nlinks from 0 to 1
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>
>
>
>

> 2013/4/10 符永涛 <yongtaofu@xxxxxxxxx <mailto:yongtaofu@xxxxxxxxx>>

>
>     The storage info is as following:
>     RAID-6
>     SATA HDD
>     Controller: PERC H710P Mini (Embedded)
>     Disk /dev/sdb: 30000.3 GB, 30000346562560 bytes
>     255 heads, 63 sectors/track, 3647334 cylinders
>     Units = cylinders of 16065 * 512 = 8225280 bytes
>     Sector size (logical/physical): 512 bytes / 512 bytes
>     I/O size (minimum/optimal): 512 bytes / 512 bytes
>     Disk identifier: 0x00000000
>
>     sd 0:2:1:0: [sdb] 58594426880 512-byte logical blocks: (30.0 TB/27.2
>     TiB)
>     sd 0:2:1:0: [sdb] Write Protect is off
>     sd 0:2:1:0: [sdb] Mode Sense: 1f 00 00 08
>     sd 0:2:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
>     support DPO or FUA
>     sd 0:2:1:0: [sdb] Attached SCSI disk
>
>     *-storage
>            description: RAID bus controller
>            product: MegaRAID SAS 2208 [Thunderbolt]
>            vendor: LSI Logic / Symbios Logic
>            physical id: 0
>            bus info: pci@0000:02:00.0
>            logical name: scsi0
>            version: 01
>            width: 64 bits
>            clock: 33MHz
>            capabilities: storage pm pciexpress vpd msi msix bus_master
>     cap_list rom
>            configuration: driver=megaraid_sas latency=0
>            resources: irq:42 ioport:fc00(size=256)
>     memory:dd7fc000-dd7fffff memory:dd780000-dd7bffff
>     memory:dc800000-dc81ffff(prefetchable)
>          *-disk:0
>               description: SCSI Disk
>               product: PERC H710P
>               vendor: DELL
>               physical id: 2.0.0
>               bus info: scsi@0:2.0.0
>               logical name: /dev/sda
>               version: 3.13
>               serial: 0049d6ce1d9f2035180096fde490f648
>               size: 558GiB (599GB)
>               capabilities: partitioned partitioned:dos
>               configuration: ansiversion=5 signature=000aa336
>          *-disk:1
>               description: SCSI Disk
>               product: PERC H710P
>               vendor: DELL
>               physical id: 2.1.0
>               bus info: scsi@0:2.1.0
>               logical name: /dev/sdb
>               logical name: /mnt/xfsd
>               version: 3.13
>               serial: 003366f71da22035180096fde490f648
>               size: 27TiB (30TB)
>               configuration: ansiversion=5 mount.fstype=xfs
>     mount.options=rw,relatime,attr2,delaylog,logbsize=64k,sunit=128,swidth=1280,noquota
>     state=mounted
>
>     Thank you.
>
>
>     2013/4/10 Emmanuel Florac <eflorac@xxxxxxxxxxxxxx

>     <mailto:eflorac@xxxxxxxxxxxxxx>>

>
>         Le Tue, 9 Apr 2013 23:10:03 +0800

>         符永涛 <yongtaofu@xxxxxxxxx <mailto:yongtaofu@xxxxxxxxx>> écrivait:

>
>         > > Apr  9 11:01:30 cqdx kernel: XFS (sdb): I/O Error Detected.
>         > > Shutting down filesystem
>
>         This. I/O error detected. That means that at some point the
>         underlying
>         device (disk, RAID array, SAN volume) couldn't be reached. So this
>         could very well be a case of a flakey drive, array, cable or SCSI
>         driver.
>
>         What's the storage setup here?
>
>         --
>         ------------------------------------------------------------------------
>         Emmanuel Florac     |   Direction technique
>                             |   Intellique
>                             |   <eflorac@xxxxxxxxxxxxxx

>         <mailto:eflorac@xxxxxxxxxxxxxx>>

>                             |   +33 1 78 94 84 02
>         ------------------------------------------------------------------------
>
>
>
>
>     --
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