Re: [patch] free_filps locking?

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Tim Waugh wrote:
>
> I've been looking at an oops that happened on 2.2.12-20smp (i386) on a
> four-processor SMP machine. It turns out that in remove_filp,
> file->f_next and file->f_pprev are both NULL.
>
> I wonder if it could be a race between insert_file_free and
> get_empty_filp, but it seems very odd that I'm the only one to see this
> race! Here's the patch I think might help (I haven't tried it yet):
>

This code should be protected by lock_kernel().

Do you use iBCS or any other unusual module? Perhaps a module doesn't
call lock_kernel().

--
	Manfred
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