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    SubjectRe: 2.6.24-rc3-mm1: I/O error, system hangs

    Le 21.11.2007 23:41, Andrew Morton a écrit :
    > On Wed, 21 Nov 2007 22:45:22 +0100
    > Laurent Riffard <laurent.riffard@free.fr> wrote:
    >
    >> Le 21.11.2007 05:45, Andrew Morton a écrit :
    >>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc3/2.6.24-rc3-mm1/
    >> Hello,
    >>
    >> My system hangs shortly after I logged in Gnome desktop. SysRq-W shows
    >> that a bunch of task are blocked in "D" state, they seem to wait for
    >> some I/O completion. I can try to hand-copy some data if requested.
    >>
    >> I found these messages in dmesg:
    >>
    >> ~$ grep -C2 end_request dmesg-2.6.24-rc3-mm1
    >> EXT3-fs: mounted filesystem with ordered data mode.
    >> sd 0:0:0:0: [sda] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
    >> end_request: I/O error, dev sda, sector 16460
    >> ReiserFS: sda7: found reiserfs format "3.6" with standard journal
    >> ReiserFS: sda7: using ordered data mode
    >> --
    >> ReiserFS: sda7: Using r5 hash to sort names
    >> sd 0:0:1:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
    >> end_request: I/O error, dev sdb, sector 19632
    >> sd 0:0:1:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
    >> end_request: I/O error, dev sdb, sector 40037363
    >> Adding 1048568k swap on /dev/mapper/vglinux1-lvswap. Priority:-1 extents:1 across:1048568k
    >> lp0: using parport0 (interrupt-driven).
    >>
    >> These errors occur *only* with 2.6.24-rc3-mm1, they are 100% reproducible.
    >> 2.6.24-rc3 and 2.6.24-rc2-mm1 are fine.
    >>
    >> Maybe something is broken in pata_via driver ?
    >>
    >
    > Could be - libata-reimplement-ata_acpi_cbl_80wire-using-ata_acpi_gtm_xfermask.patch
    > and pata_amd-pata_via-de-couple-programming-of-pio-mwdma-and-udma-timings.patch
    > touch pata_via.c.

    None of the above...

    I did a bisection, it spotted git-scsi-misc.patch.
    I just run 2.6.24-rc3-mm1 + revert-git-scsi-misc.patch, and it works fine.

    I guess commit 8655a546c83fc43f0a73416bbd126d02de7ad6c0 "[SCSI] Do not
    requeue requests if REQ_FAILFAST is set" is the real culprit. The other
    commits are touching documentation or drivers I don't use. I'll try
    to revert only this one this evening.

    --
    laurent


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