Re: [regression] Crash in wb_clear_pending() (was: Linux 2.6.35-rc4)

From: Ingo Molnar
Date: Mon Jul 05 2010 - 13:14:42 EST



* Ingo Molnar <mingo@xxxxxxx> wrote:

> * Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
>
> > We had a thread about it a few days ago. The following commit from
> > Jens' 2.6.36 tree needs to go into 2.6.35 to sort the issues with the
> > fragile wakeup mechanism which only got worse by the patches out:
> >
> > http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=79338d2a78ab78efdc1698f1309766a039addf9d
>
> I've attached it below - in case someone wants to apply it before it hits
> upstream.
>
> Scary big patch btw. - is there no smaller fix?

Nor does it apply to v2.6.35-rc4:

Applying: writeback: simplify the write back thread queue
error: patch failed: fs/fs-writeback.c:703
error: fs/fs-writeback.c: patch does not apply
Patch failed at 0001 writeback: simplify the write back thread queue

I guess it has other dependencies as well. If you want me to test the fix then
please send a version that applies.

Thanks,

Ingo
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