New: unreliable IO for ata disks under heavy io load
https://bugzilla.kernel.org/show_bug.cgi?id=15722
Summary: unreliable IO for ata disks under heavy io load
Product: SCSI Drivers
Version: 2.5
Kernel Version: 2.6.32-2.6.33
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
with 2.6.32 valilla mptsas driver and 4.22.00 lsi driver, and SATA disks connected through lsi 24x expander, SATA passthrough command sometimes gets resetted during heavy IO. I found this problem is very similar with the bug 14831 in bugzilla.kernel.org
https://bugzilla.kernel.org/show_bug.cgi?id=14831 .
lots of task abort, task reset, bus reset logs in dmesg. the IO is then stalled for somewhile until the resets success.
However, the problem only occures when we connect more than 12 SATA disks through expander and during heavy disk io. If we use SAS disks or we connect 16 SATA disks directly to 1068e card or we use less than 12 disks, the problem seems just disappear.
2.6.21 kernel mptsas driver seems worse.
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[Bug 15722] unreliable IO for ata disks under heavy io load
https://bugzilla.kernel.org/show_bug.cgi?id=15722
[email protected] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
Severity|high |lowAndrew Morton <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected] Component|Other |Serial ATA AssignedTo|scsi_drivers-other@kernel-b |[email protected] |ugs.osdl.org | Product|SCSI Drivers |IO/Storage
--- Comment #1 from [email protected] 2010-04-09 09:15:33 --- This should not be related with mptsas driver. We tested the same scenario with lsi 36x expander and could not reproduce the same problem. It seems that the problem is related to the original lsi 24x expander. Maybe the expander firmware problem.
--- Comment #2 from Andrew Morton <[email protected]> 2010-04-09 20:57:05 --- I think this is more likely to be a libata problem than a scsi problem?
I recategorised it that way, thanks.
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[Bug 15722] unreliable IO for ata disks under heavy io load
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=15722
Andrew Morton <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|Serial ATA |Other
AssignedTo|[email protected] |scsi_drivers-other@kernel-b
| |ugs.osdl.org
Product|IO/Storage |SCSI DriversSignature · 3 lines
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