Hi James,
* James Bottomley writes:
> On Tue, 2010-11-02 at 18:11 +0100, Ralf Gerbig wrote:
>> >> Nov 2 10:40:57 gerlin1 kernel: [45977.560407] RIP: 0010:[<ffffffff811d2290>] [<ffffffff811d2290>] scsi_dispatch_cmd+0x92/0x22e
>>
>> > This is the faulting location ... could you run addr2line on this
>> > address to map it to a line of source code?
>>
>> addr2line id only say ??:0
>>
>> I recompiled vmlinux with debugging symbols, and gdb says:
>>
>> Reading symbols from /usr/src/linux-git/linux-2.6/vmlinux...done.
>> (gdb) l *(scsi_dispatch_cmd + 0x92)
>> 0xffffffff811d2290 is in scsi_dispatch_cmd (drivers/scsi/scsi.c:707).
>> 702 * We will wait MIN_RESET_DELAY clock ticks after the
>> last reset so
>> 703 * we can avoid the drive not being ready.
>> 704 */
>> 705 timeout = host->last_reset + MIN_RESET_DELAY;
>> 706
>> 707 if (host->resetting && time_before(jiffies, timeout)) {
>> 708 int ticks_remaining = timeout - jiffies;
>> 709 /*
>> 710 * NOTE: This may be executed from within an interrupt
>> 711 * handler! This is bad, but for now, it'll do. The irq
> Um, that's bad. It's saying the junk pointer is host on line 707 but
> when it was dereferenced on line 705 it was fine. This is most likely
> to indicate either memory corruption (another thread overwrote the host
> location or even a hardware fault).
Oh well, back to 2.6.36-rc8-00045-g51ea8a8, lets wait and see.
BTW there was a secondary trace - short transcript:
general protection fault: 0000 [#2] PREEMPT SMP
last sysfs file: /sys/system/virtual/sound/uevent
CPU 2
Modules ....
Pid: 0, comm: kworker/0:1 Tainted: G D
Rip: 0010:[<ffffffff811d6a9b>] [<ffffffff811d6a9b>] scsi_times_out+0x1b/0x6d
[...]
(gdb) l *(scsi_times_out + 0x1b)
0xffffffff811d6a9b is in scsi_times_out (drivers/scsi/scsi_error.c:136).
131 enum blk_eh_timer_return rtn = BLK_EH_NOT_HANDLED;
132
133 trace_scsi_dispatch_cmd_timeout(scmd);
134 scsi_log_completion(scmd, TIMEOUT_ERROR);
135
136 if (scmd->device->host->transportt->eh_timed_out)
137 rtn = scmd->device->host->transportt->eh_timed_out(scmd);
138 else if (scmd->device->host->hostt->eh_timed_out)
139 rtn = scmd->device->host->hostt->eh_timed_out(scmd);
140
JPEG is there for the asking.
Thanks for your help,
Ralf
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