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SubjectRe: 2.6.17-rc2-mm1

>>double fault: 0000 [1] SMP
>>last sysfs file: /devices/pci0000:00/0000:00:06.0/resource
>>CPU 0
>>Modules linked in:
>>Pid: 20519, comm: mtest01 Not tainted 2.6.17-rc3-mm1-autokern1 #1
>>RIP: 0010:[<ffffffff8047c8b8>] <ffffffff8047c8b8>{__sched_text_start+1856}
>>RSP: 0000:0000000000000000 EFLAGS: 00010082
>>RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff805d9438
>>RDX: ffff8100db12c0d0 RSI: ffffffff805d9438 RDI: ffff8100db12c0d0
>>RBP: ffffffff805d9438 R08: 0000000000000000 R09: 0000000000000000
>>R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
>>R13: ffff8100e39bd440 R14: ffff810008003620 R15: 000002b02751726c
>>FS: 0000000000000000(0000) GS:ffffffff805fa000(0063) knlGS:00000000f7dd0460
>>CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
>>CR2: fffffffffffffff8 CR3: 00000000da399000 CR4: 00000000000006e0
>>Process mtest01 (pid: 20519, threadinfo ffff8100b1bb4000, task
>>Stack: ffffffff80579e20 ffff8100db12c0d0 0000000000000001 ffffffff80579f58
>> 0000000000000000 ffffffff80579e78 ffffffff8020b0b2 ffffffff80579f58
>> 0000000000000000 ffffffff80485520
>>Call Trace: <#DF> <ffffffff8020b0b2>{show_registers+140}
>> <ffffffff8020b357>{__die+159} <ffffffff8020b3cc>{die+50}
>> <ffffffff8020bba6>{do_double_fault+115}
>> <ffffffff8047c8b8>{__sched_text_start+1856} <EOE>
>>Code: e8 4c ba d8 ff 65 48 8b 34 25 00 00 00 00 4c 8b 46 08 f0 41
>>RIP <ffffffff8047c8b8>{__sched_text_start+1856} RSP <0000000000000000>
>> -- 0:conmux-control -- time-stamp -- May/01/06 3:54:37 --
> I was not able to reproduce this on the 4-way EMT64 machine. Am a bit stuck.

OK, is there anything we could run this with that'd dump more info?
(eg debug patches or something). There's bugger all of use that I
can see in that stack (and why does __sched_text_start come up anyway,
is that an x86_64-ism ?). I suppose if we're really desperate, we can
play chop search, but that's very boring to try to do remotely ...

It's a couple-of-year-old 4x newisys box.

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