[Bug 12551] New: end_request: I/O error, dev cciss/c0d0, sector 87435720

[Bug 12551] New: end_request: I/O error, dev cciss/c0d0, sector 87435720

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=12551

           Summary: end_request: I/O error, dev cciss/c0d0, sector 87435720
           Product: File System
           Version: 2.5
     KernelVersion: 2.6.29-rc2-git3
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: ralf.hildebrandt@charite.de


Latest working kernel version: 2.6.28.1
Earliest failing kernel version: 2.6.29-rc2-git3
Distribution: Debian/testing
Hardware Environment:
Software Environment:
Problem Description:

Steps to reproduce:

With 2.6.29-rc2-git3, I suddenly get:

[   73.306279] ip_tables: (C) 2000-2006 Netfilter Core Team
[   80.047614] end_request: I/O error, dev cciss/c0d0, sector 52257960
[   80.047689] JBD: barrier-based sync failed on cciss!c0d0p8:8 - disabling
barriers
[   80.089865] end_request: I/O error, dev cciss/c0d0, sector 87435720
[   80.089931] JBD: barrier-based sync failed on cciss!c0d0p9:8 - disabling
barriers
[   80.141581] end_request: I/O error, dev cciss/c0d0, sector 105586480
[   80.141643] JBD: barrier-based sync failed on cciss!c0d0p10:8 - disabling
barriers

With 2.6.28.1 I didn't get those.


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[Bug 12551] end_request: I/O error, dev cciss/c0d0, sector 87435720

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=12551





------- Comment #1 from ralf.hildebrandt@charite.de  2009-01-27 06:52 -------
[    5.928545] EXT4-fs: barriers enabled
[    5.937105] kjournald2 starting: pid 703, dev cciss!c0d0p8:8, commit
interval 5 seconds
[    5.946272] EXT4 FS on cciss!c0d0p8, internal journal on cciss!c0d0p8:8
[    5.946331] EXT4-fs: delayed allocation enabled
[    5.946392] EXT4-fs: file extents enabled
[    5.946592] EXT4-fs: mballoc enabled
[    5.946646] EXT4-fs: mounted filesystem cciss!c0d0p8 with ordered data mode
[    5.976729] EXT4-fs: barriers enabled
[    5.985294] kjournald2 starting: pid 704, dev cciss!c0d0p9:8, commit
interval 5 seconds
[    5.989773] EXT4 FS on cciss!c0d0p9, internal journal on cciss!c0d0p9:8
[    5.989833] EXT4-fs: delayed allocation enabled
[    5.989889] EXT4-fs: file extents enabled
[    5.990093] EXT4-fs: mballoc enabled
[    5.990148] EXT4-fs: mounted filesystem cciss!c0d0p9 with ordered data mode
[    6.011721] EXT4-fs: barriers enabled
[    6.012150] kjournald2 starting: pid 705, dev cciss!c0d0p10:8, commit
interval 5 seconds
[    6.020273] EXT4 FS on cciss!c0d0p10, internal journal on cciss!c0d0p10:8
[    6.020332] EXT4-fs: delayed allocation enabled
[    6.020387] EXT4-fs: file extents enabled
[    6.020604] EXT4-fs: mballoc enabled
[    6.020659] EXT4-fs: mounted filesystem cciss!c0d0p10 with ordered data mode


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[Bug 12551] end_request: I/O error, dev cciss/c0d0, sector 87435720

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=12551


tytso@mit.edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mike.miller@hp.com




------- Comment #2 from tytso@mit.edu  2009-01-27 07:42 -------
Looks like the cciss driver is returning an error when we try to do a write
with barriers enabled.   If we get a failure return from the device driver, we
fall back to writing the commit block w/o barriers, and that is apparently
succeeding.   So this looks like a cciss issue.

I've added Mike Miller, the maintainer of the cciss driver, to the cc list. 
Mike, does this ring any bells; has there been any changes between 2.6.28.1 and
2.6.29-rc2-git3 that might account for this?


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[Bug 12551] end_request: I/O error, dev cciss/c0d0, sector 87435720

[bugme-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=12551


mike.miller@hp.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|fs_ext4@kernel-bugs.osdl.org|mike.miller@hp.com
             Status|NEW                         |ASSIGNED




------- Comment #3 from mike.miller@hp.com  2009-01-27 08:51 -------
cciss does not support write barriers at this time. Seems that someone in the
community requested updated specs so they might implement the support, but I
can't find that particular mail.
I'll have to look at how other drivers implement write barriers.


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