From: Linus Torvalds <[email protected]>
Date: Wed, 27 Dec 2006 16:39:43 -0800 (PST)
>
>
> On Wed, 27 Dec 2006, Linus Torvalds wrote:
> >
> > I think the test-case could probably be improved by having a munmap() and
> > page-cache flush in between the writing and the checking, to see whether
> > that shows the corruption easier (and possibly without having to start
> > paging in order to throw the pages out, which would simplify testing a
> > lot).
>
> I think the page-writeout is implicated, because I do seem to need it, but
> the page-cache flush does seem to make corruption _easier_ to see. I now
> seem about to trigger it with a 100MB file on a 256MB machine in a minute
> or so, with this slight modification.
>
> I still don't see _why_, though. But maybe smarter people than me can see
> it..
FWIW this program definitely triggers the bug for me.
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