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SubjectPossible hang inside interrupt handler on sata_promise.

I have been experiencing hangs on a newly setup machine. Unfortunately,
it appears to be hanging inside the interrupt handler as sysrq and
caps-lock led seem to stop working when the event occurs. I am guessing
it is related to the sata_promise driver, but that is only a guess as
I don't get much for output. I am running the debian unstable kernel
(2.6.22-1-686), but the problem also occurs with the debian stable kernel
(2.6.18-4-686). I do need to boot with the acpi=off option, but am
not sure if that is related. Unfortunately, I do not know much about
troubleshooting i386 when problems occur inside the interrupt handlers.

What can I do to help troubleshoot this problem.

Thanks,
Robin Holt


PS: A little background information:

# lspci -v
...
00:0b.0 Mass storage controller: Promise Technology, Inc. PDC40718 (SATA 300 TX4) (rev 02)
Subsystem: Promise Technology, Inc. PDC40718 (SATA 300 TX4)
Flags: bus master, 66MHz, medium devsel, latency 72, IRQ 10
I/O ports at d400 [size=128]
I/O ports at d800 [size=256]
Memory at f8042000 (32-bit, non-prefetchable) [size=4K]
Memory at f8000000 (32-bit, non-prefetchable) [size=128K]
[virtual] Expansion ROM at 30020000 [disabled] [size=32K]
Capabilities: [60] Power Management version 2

00:0c.0 Mass storage controller: Promise Technology, Inc. PDC40718 (SATA 300 TX4) (rev 02)
Subsystem: Promise Technology, Inc. PDC40718 (SATA 300 TX4)
Flags: bus master, 66MHz, medium devsel, latency 72, IRQ 11
I/O ports at dc00 [size=128]
I/O ports at e000 [size=256]
Memory at f8041000 (32-bit, non-prefetchable) [size=4K]
Memory at f8020000 (32-bit, non-prefetchable) [size=128K]
[virtual] Expansion ROM at 30028000 [disabled] [size=32K]
Capabilities: [60] Power Management version 2

# cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md2 : active raid6 sda1[0] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1]
1953535744 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU]
...


The md2 device is a single pv in a vg (VG_DATA) and currently has a
single lv which is 40GB and contains an xfs filesystem.


# dmesg
...
sata_promise 0000:00:0b.0: version 2.07
sata_promise 0000:00:0b.0: applying SATAII TX4 port numbering workaround
scsi0 : sata_promise
scsi1 : sata_promise
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
scsi2 : sata_promise
scsi3 : sata_promise
ata1: SATA max UDMA/133 cmd 0xe080e380 ctl 0xe080e3b8 bmdma 0x00000000 irq 10
ata2: SATA max UDMA/133 cmd 0xe080e280 ctl 0xe080e2b8 bmdma 0x00000000 irq 10
ata3: SATA max UDMA/133 cmd 0xe080e200 ctl 0xe080e238 bmdma 0x00000000 irq 10
ata4: SATA max UDMA/133 cmd 0xe080e300 ctl 0xe080e338 bmdma 0x00000000 irq 10
ata1: SATA link down (SStatus 0 SControl 300)
ata2: SATA link down (SStatus 0 SControl 300)
ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata3.00: ATA-7: WDC WD5000AAKS-00TMA0, 12.01C01, max UDMA/133
ata3.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata3.00: configured for UDMA/133
ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata4.00: ATA-7: WDC WD5000KS-00MNB0, 07.02E07, max UDMA/133
ata4.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata4.00: configured for UDMA/133
scsi 2:0:0:0: Direct-Access ATA WDC WD5000AAKS-0 12.0 PQ: 0 ANSI: 5
scsi 3:0:0:0: Direct-Access ATA WDC WD5000KS-00M 07.0 PQ: 0 ANSI: 5
sata_promise 0000:00:0c.0: applying SATAII TX4 port numbering workaround
scsi4 : sata_promise
scsi5 : sata_promise
scsi6 : sata_promise
scsi7 : sata_promise
ata5: SATA max UDMA/133 cmd 0xe081c380 ctl 0xe081c3b8 bmdma 0x00000000 irq 11
ata6: SATA max UDMA/133 cmd 0xe081c280 ctl 0xe081c2b8 bmdma 0x00000000 irq 11
ata7: SATA max UDMA/133 cmd 0xe081c200 ctl 0xe081c238 bmdma 0x00000000 irq 11
ata8: SATA max UDMA/133 cmd 0xe081c300 ctl 0xe081c338 bmdma 0x00000000 irq 11
ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata5.00: ATA-7: WDC WD5000KS-00MNB0, 07.02E07, max UDMA/133
ata5.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata5.00: configured for UDMA/133
ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata6.00: ATA-7: WDC WD5000KS-00MNB0, 07.02E07, max UDMA/133
ata6.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata6.00: configured for UDMA/133
ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata7.00: ATA-7: WDC WD5000KS-00MNB0, 07.02E07, max UDMA/133
ata7.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata7.00: configured for UDMA/133
ata8: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata8.00: ATA-7: WDC WD5000AAKS-00TMA0, 12.01C01, max UDMA/133
ata8.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata8.00: configured for UDMA/133
scsi 4:0:0:0: Direct-Access ATA WDC WD5000KS-00M 07.0 PQ: 0 ANSI: 5
scsi 5:0:0:0: Direct-Access ATA WDC WD5000KS-00M 07.0 PQ: 0 ANSI: 5
scsi 6:0:0:0: Direct-Access ATA WDC WD5000KS-00M 07.0 PQ: 0 ANSI: 5
scsi 7:0:0:0: Direct-Access ATA WDC WD5000AAKS-0 12.0 PQ: 0 ANSI: 5

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