critical bug in sata driver ?

critical bug in sata driver ?

[Janos Haar]

Hello, list,

I have a reproducible _software_ bug about sata. (libata?)

In my system i have 4 nodes, each has 12 hdd.
All hw are equal, and 110% tested, and really error free!

But 2 of my nodes, frequently reboots without and any error message on
remote syslog, and netconsole.
No oops, no nothing!
(loglevel 9)

Only in serial console can show some time a little clue:

"ata2: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
ata2: status=0x51 { DriveReady SeekComplete Error"

After this little partial message, the system immediately reboots!

Thats the all.

The smart log is clear in _all_ my 48 hdd.
Anyway the disk and cable in ata2 port is replaced, but this not helps.

The kernel 2.6.16.1, 2.6.17-rc3-git1. (now i trying the latest rc and git.)
(I cannot try the 2.6.16 > kernels, because my sata card are unsupported on
older versions.)

The dmesg log is  here from my node #1:
http://download.netcenter.hu/bughunt/20060605/dmesg.txt

I have compile the kernel with these debug options:
[*] Magic SysRq key
[*] Kernel debugging
[*]   Collect scheduler statistics
[*]   Mutex debugging, deadlock detection
[*] Force gcc to inline functions marked 'inline'
[*] Check for stack overflows
(2) Stack backtraces per line
[*] Debug page memory allocations
[*] Write protect kernel read-only data structures

Can somebody find and fix it?

I can do almost anything to helping to debug!


Thanks,
Janos

Re: critical bug in sata driver ?

[Janos Haar]

----- Original Message ----- 
From: "Janos Haar" <djani22@netcenter.hu>
To: <linux-kernel@vger.kernel.org>
Sent: Monday, June 05, 2006 12:27 PM
Subject: critical bug in sata driver ?


> Hello, list,
>
> I have a reproducible _software_ bug about sata. (libata?)
>
> In my system i have 4 nodes, each has 12 hdd.
> All hw are equal, and 110% tested, and really error free!
>
> But 2 of my nodes, frequently reboots without and any error message on
> remote syslog, and netconsole.
> No oops, no nothing!
> (loglevel 9)
>
> Only in serial console can show some time a little clue:
>
> "ata2: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
> ata2: status=0x51 { DriveReady SeekComplete Error"
>
> After this little partial message, the system immediately reboots!
>
> Thats the all.
>
> The smart log is clear in _all_ my 48 hdd.
> Anyway the disk and cable in ata2 port is replaced, but this not helps.
>
> The kernel 2.6.16.1, 2.6.17-rc3-git1. (now i trying the latest rc and
git.)
> (I cannot try the 2.6.16 > kernels, because my sata card are unsupported
on
> older versions.)

It happens with the 2.6.17-rc5-git11 too. :-(
I gets more and more closer to can trigger this problem, and it looks like
an read error on one of my disks.
But without the error message, i cannot determine, wich are the tricky hdd.

>
> The dmesg log is  here from my node #1:
> http://download.netcenter.hu/bughunt/20060605/dmesg.txt
>
> I have compile the kernel with these debug options:
> [*] Magic SysRq key
> [*] Kernel debugging
> [*]   Collect scheduler statistics
> [*]   Mutex debugging, deadlock detection
> [*] Force gcc to inline functions marked 'inline'
> [*] Check for stack overflows
> (2) Stack backtraces per line
> [*] Debug page memory allocations
> [*] Write protect kernel read-only data structures
>
> Can somebody find and fix it?
>
> I can do almost anything to helping to debug!
>
>
> Thanks,
> Janos
>
> -
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