[Bug 11646] QLA2xxx: Kernel deadlock on high load somewhere after 2.6.20

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http://bugzilla.kernel.org/show_bug.cgi?id=11646





------- Comment #20 from seokmann.ju@xxxxxxxxxx  2009-02-27 02:28 -------
>From the log from #19, the multipathd caused recursive
interventions/interruptions to the target so that no more stable path to it is
available.
---
Feb 26 23:50:42 fred multipathd: sdh: directio checker reports path is down
Feb 26 23:50:42 fred multipathd: checker failed path 8:112 in map multi_3_db
Feb 26 23:50:42 fred multipathd: multi_3_db: remaining active paths: 1
Feb 26 23:50:42 fred kernel: [14020652.739423] device-mapper: multipath:
Failing path 8:112.
Feb 26 23:50:42 fred multipathd: sdj: directio checker reports path is down
Feb 26 23:50:42 fred multipathd: checker failed path 8:144 in map mpath7
Feb 26 23:50:42 fred multipathd: mpath7: remaining active paths: 0
---


And it, in turn, caused to trigger timout event followed by aborting commands,
as below.
---
Feb 26 23:50:41 fred kernel: [14020651.786979] qla2xxx_eh_abort(3): aborting sp
ffff81003c1360c0 from RISC. pid=334462.
Feb 26 23:50:41 fred kernel: [14020651.787849] scsi(3): ABORT status detected
0x5-0x0.
Feb 26 23:50:41 fred kernel: [14020651.788110] qla2xxx 0000:08:01.0:
scsi(3:0:3): Abort command issued -- 1 51a7e 2002.
Feb 26 23:50:41 fred kernel: [14020651.847108] qla2xxx_eh_abort(3): aborting sp
ffff81003c136dc0 from RISC. pid=334463.
Feb 26 23:50:41 fred kernel: [14020651.847973] scsi(3): ABORT status detected
0x5-0x0.
Feb 26 23:50:41 fred kernel: [14020651.848242] qla2xxx 0000:08:01.0:
scsi(3:0:9): Abort command issued -- 1 51a7f 2002.
---


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