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SubjectLinux Kernel 2.6.13-rc7 (WORKS) (2.6.13, DRQ/System CRASH)
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.

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...

Thanks.


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