Re: 2.6.9-rc2-mm4 ps hang ?

[Badari Pulavarty]

On Fri, 2004-10-01 at 16:49, Andrew Morton wrote:
> Badari Pulavarty <pbadari@xxxxxxxxxx> wrote:
> >
> > Here is the full sysrq-t output.
> 
> What's this guy up to?
...
> 
> Something is seriously screwed up if it's stuck in try_to_wake_up().  Tried
> generating a few extra traces?
> 
> Then again, maybe we're missing an up_read() somewhere.  hrm, I'll check.
> 

It reproduced again. I think this is the one causing all the troubles..

db2fmcd       D ffffffff80132e2a     0 10854   7636                    
(NOTLB)
00000101bae85ef8 0000000000000002 0000020800000018 00000101d9ddd550
       0000000100000084 000001016d490e20 000001016d491158
00000101d9ddd550
       0000000000000206 ffffffff801353cb
Call Trace:<ffffffff801353cb>{try_to_wake_up+971}
<ffffffff804455f0>{__down_write+128}
       <ffffffff80125e6f>{sys32_mmap+143}
<ffffffff80124af1>{ia32_sysret+0}

when I tried looking at /proc/10854 - it hung.

elm3b29:~ # cd /proc/10854
elm3b29:/proc/10854 # l

ls            D 000000000051bb70     0 28029  27737                    
(NOTLB)
00000101ac9b1e28 0000000000000006 702e6d6574737973 ffffffff8054f240
       000000000000009f 00000101df4fa9a0 00000101df4facd8
0000000000000000
       000000d000000002 00000101ac9b1e68
Call Trace:<ffffffff80445692>{__down_read+130}
<ffffffff801b79a9>{proc_exe_link+73}
       <ffffffff801b7745>{proc_pid_readlink+165}
<ffffffff8018a511>{sys_readlink+161}
       <ffffffff8011075e>{system_call+126}


I have no idea what db2fmcd is stuck on. I will try to find out more..

Thanks,
Badari


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