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    SubjectRe: Linux Kernel 2.6.13-rc7 (WORKS) (2.6.13, DRQ/System CRASH)
    On 8/31/05, Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
    > All,
    >
    > I am trying to get everyone together on this to hopefully solve a serious
    > bug that I have seen on multiple machines with:
    >
    > a) A Promise ATA/133 controller (ATA/100 works OK)
    > b) Kernel 2.6.12 or 2.6.13 (2.6.13-rc7 appears to be OK)
    >
    > The drive is a Seagate 7200.8 400GB 7200RPM 8MB cache disk.
    > hde: ST3400832A, ATA DISK drive
    >
    > With older kernels, if I *DO NOT ENABLE DMA* it does not crash.
    > If I *ENABLE DMA* then proceed to do anything with the disk, it will
    > FREEZE the box, no oops, etc, *FREEZE*.
    >
    > hdparm -t /dev/hde
    > mkfs.xfs -f /dev/hde1
    >
    > Will freeze the box.
    >
    > -------
    >
    > Linux Kernel 2.6.13 final experiences the same problems as 2.6.12.5.
    >
    > I have e-mailed the list quite a few times with this issue, I am surprised
    > very few people run into it.
    >
    > Here is the error in the logs:
    >
    > Aug 31 11:30:25 p34 kernel: hde: dma_timer_expiry: dma status == 0x20
    > Aug 31 11:30:25 p34 kernel: hde: DMA timeout retry
    > Aug 31 11:30:25 p34 kernel: PDC202XX: Primary channel reset.
    > Aug 31 11:30:25 p34 kernel: hde: timeout waiting for DMA
    > Aug 31 11:30:25 p34 kernel: hde: status error: status=0x58 { DriveReady
    > SeekComplete DataRequest }
    > Aug 31 11:30:25 p34 kernel: hde: drive not ready for command
    > Aug 31 11:30:25 p34 kernel: hde: status timeout: status=0xd0 { Busy }
    > Aug 31 11:30:25 p34 kernel: PDC202XX: Primary channel reset.
    > Aug 31 11:30:25 p34 kernel: hde: no DRQ after issuing MULTWRITE_EXT
    > Aug 31 11:30:25 p34 kernel: ide2: reset: success
    >
    > After this, the machine locks up with 2.6.13.
    >
    > With 2.6.13-rc7, I have not seen this once.

    Absolutely no IDE changes from -rc7 to 2.6.13 final
    and I don't see anything suspicious in the patch.

    You may try using git to track this regression
    (but it looks like a bad drive for me).

    Bartlomiej

    > Can anyone offer any insight to why this is happening? I have a few
    > machines with the ATA/133 controller and 400GB drives; therefore, I'd
    > prefer to fix the problem rather than hooking up older, ATA/100 drives,
    > just so I can run newer kernels...
    -
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