Re: 2.5.50 hang when copying files, handwritten trace included

From: Andrew Morton (akpm@digeo.com)
Date: Mon Dec 02 2002 - 13:41:54 EST

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Helge Hafting wrote:
>
> 2.5.50 hung when copying 800M.
> mke2fs on a 10G partition, then try to copy
> the entire /home there. Source and destionation
> was on the same disk. After a while, this happened:
>
> EIP: wake_up_forked_process+0xb8/0x18c
> EAX: 5a5a5a5a (suspicious)
>
> trace:
> do_fork
> kernel_thread
> pdflush
> kernel_thread_helper
> start_one_pdflush_thread
> pdflush
> __pdflush
> __pdflush
> background_writeout
> kernel_thread_helper
>

Yes please - if you could gather sufficient info to enable
us to determine what eax is pointing at in wake_up_forked_process(),
that would help. Presumably it's the new process, which is rather
bizarre.

Also, does disabling preemption make it stop?

Thanks.
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