On Mon, Mar 12, 2007 at 09:54:47AM +0100, Frank van Maarseveen wrote:
> 
> 2.6.19 is ok, 2.6.20.[12] hangs from the moment DMA is turned on (hdparm
> -d 1 /dev/hda):
> 
>       hda: dma_timer_expiry: dma status == 0x20
>       hda: DMA timeout retry
>       hda: timeout waiting for DMA
>       hda: status error: status=0x58 {
>       DriveReady
>       SeekComplete
>       DataRequest
>       }

I have a totally different PATA based system (P4 HT) with similar symptoms
except that it seem to recover by switching DMA off during boot after
5 errors:

hda: dma_timer_expiry: dma status == 0x20
hda: DMA timeout retry
hda: timeout waiting for DMA
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x20
hda: DMA timeout retry
hda: timeout waiting for DMA
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x20
hda: DMA timeout retry
hda: timeout waiting for DMA
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x20
hda: DMA timeout retry
hda: timeout waiting for DMA
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command
hda: dma_timer_expiry: dma status == 0x20
hda: DMA timeout retry
hda: timeout waiting for DMA
hda: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hda: drive not ready for command

So in this case it doesn't hang but is not really usable either.

lspci:
00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub 
Interface (rev 02)
00:01.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to AGP Controller (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI 
Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI 
Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI 
Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI 
Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI 
Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface 
Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller 
(rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 
02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) 
AC'97 Audio Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] 
(rev a1)
02:00.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet 
Controller (rev 05)

This system has SATA but there's only one PATA disk

-- 
Frank
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