Re: SATA exceptions with 2.6.20-rc5

[Mikael Pettersson <mikpe@it.uu.se>]

Björn Steinbrink writes:
 > Hi,
 > 
 > with 2.6.20-rc{2,4,5} (no other tested yet) I see SATA exceptions quite
 > often, with 2.6.19 there are no such exceptions. dmesg and lspci -v
 > output follows. In the meantime, I'll start bisecting.
 > 
 > Thanks
 > Björn
 > 
 > 
 > Linux version 2.6.20-rc2 (doener@atjola) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #4 SMP Sun Dec 31 12:54:22 CET 2006

[uneventful kernel log omitted]

 > sata_nv 0000:00:07.0: Using ADMA mode
 > PCI: Setting latency timer of device 0000:00:07.0 to 64
 > ata1: SATA max UDMA/133 cmd 0xFFFFC20000004480 ctl 0xFFFFC200000044A0 bmdma 0xD400 irq 23
 > ata2: SATA max UDMA/133 cmd 0xFFFFC20000004580 ctl 0xFFFFC200000045A0 bmdma 0xD408 irq 23
 > scsi0 : sata_nv
 > ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
 > ata1.00: ATA-7, max UDMA/133, 160086528 sectors: LBA 
 > ata1.00: ata1: dev 0 multi count 16
 > ata1.00: configured for UDMA/133
 > scsi1 : sata_nv
 > ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
 > ata2.00: ATA-7, max UDMA/133, 160086528 sectors: LBA 
 > ata2.00: ata2: dev 0 multi count 16
 > ata2.00: configured for UDMA/133
 > scsi 0:0:0:0: Direct-Access     ATA      Maxtor 6Y080M0   YAR5 PQ: 0 ANSI: 5
 > ata1: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61
 > SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB)
 > sda: Write Protect is off
 > sda: Mode Sense: 00 3a 00 00
 > SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 > SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB)
 > sda: Write Protect is off
 > sda: Mode Sense: 00 3a 00 00
 > SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 >  sda: sda1 sda2 sda3
 > sd 0:0:0:0: Attached scsi disk sda
 > scsi 1:0:0:0: Direct-Access     ATA      Maxtor 6Y080M0   YAR5 PQ: 0 ANSI: 5
 > ata2: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61
 > SCSI device sdb: 160086528 512-byte hdwr sectors (81964 MB)
 > sdb: Write Protect is off
 > sdb: Mode Sense: 00 3a 00 00
 > SCSI device sdb: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 > SCSI device sdb: 160086528 512-byte hdwr sectors (81964 MB)
 > sdb: Write Protect is off
 > sdb: Mode Sense: 00 3a 00 00
 > SCSI device sdb: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 >  sdb: sdb1 sdb2 sdb3
 > sd 1:0:0:0: Attached scsi disk sdb

Things are fine so far.

[more uneventful kernel log omitted]

 > NVRM: loading NVIDIA Linux x86_64 Kernel Module  1.0-9631  Thu Nov  9 17:35:27 PST 2006
 > ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
 > ata1.00: cmd e7/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 in
 >          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
 > ata1: soft resetting port
 > ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
 > ata1.00: configured for UDMA/133
 > ata1: EH complete
 > SCSI device sda: 160086528 512-byte hdwr sectors (81964 MB)
 > sda: Write Protect is off
 > sda: Mode Sense: 00 3a 00 00
 > SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 > ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
 > ata1.00: cmd e7/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 out
 >          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)

and then things start to break.

Notice how the problems started exactly at the point the
"NVRM" NVIDIA module (whatever it is) was loaded ...