linux-kernel - Ask a question of ksoftirqd related call trace

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Date:	Thu, 11 Jun 2009 15:24:51 +0800 (CST)
From:	peter meng <mengsanshui@...oo.com.cn>
To:	linux-kernel@...r.kernel.org
Subject: Ask a question of ksoftirqd related call trace 


Hi

I met a problem as follow .
As i understand , ksoftirqd is kernel thread therefore the virtual is above 0xc0000000. but the threadinfo=81168000, task=811636a8 and call trace is 80134058 .... .  seems fault is at <8c820000> 
These address is user space address not kernel space address .
How to analyse this issue ? 
 
---------------------------------------------------------------------
CPU 0 Unable to handle kernel paging request at virtual address 30305230, epc == 80134384, ra == 80134bec
Oops in arch/mips/mm/fault.c::do_page_fault, line 167[#1]:
Cpu 0
$ 0   : 00000000 10008500 83f8dcc0 83f8dcc0
$ 4   : 30305230 00000000 000000a8 00000001
$ 8   : 81169fe0 00008500 00000000 80226000
$12   : 0000ffff 00008000 00007fff 00000380
$16   : 83b49ca0 00000000 c0097428 c03274b0
$20   : 80134124 00000000 c00974f4 c009737c
$24   : 00000000 2af470c0                  
$28   : 81168000 81169de8 c008a594 80134bec
Hi    : 00000280
Lo    : 00000230
epc   : 80134384     Tainted: P  
ra    : 80134bec Status: 10008502    KERNEL EXL 
Cause : 00000008
BadVA : 82cec220
PrId  : 0002a010
Process ksoftirqd/0 (pid: 2, threadinfo=81168000, task=811636a8)
Stack : 00000020 80134058 83b49ee0 82f2d280 83b49ca0 83b49ca0 80134bec 00000000
        00007c58 0000001a 00000067 0cb7bec0 00000000 80134298 00000002 
        ...
Call Trace: [<80134058>]  [<80134bec>]  [<80134298>]  [<c0097428>]  [<c009a1a4>]  [<c0092fcc>]  [<80032b90>]  [<c0099efc>]  [<c009a678>]  [<c01a8b40>]  [<80250000>]  [<8003a97c>]  [<8003a97c>]  [<8003a3d0>]  

Code: 001110c0  00431021  8c440010 <8c820000> 000212c2  30420001  14400011  00000000  8c830004 
note: ksoftirqd/0[2] exited with preempt_count 256
--------------------------------------------------------------------------

Thanks advanced 
Best Regards
Peter Meng 


      
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