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SubjectRe: Boot failure with ext2 and initrds
On Thu, 16 Nov 2006 01:48:09 -0800
Andrew Morton <akpm@osdl.org> wrote:

> On Thu, 16 Nov 2006 12:37:17 +0300
> Alex Tomas <alex@clusterfs.com> wrote:
>
> > >>>>> Andrew Morton (AM) writes:
> >
> > AM> What lock protects the fields in struct ext[234]_reserve_window from being
> > AM> concurrently modified by two CPUs? None, it seems. Ditto
> > AM> ext[234]_reserve_window_node. i_mutex will cover it for write(), but not
> > AM> for pageout over a file hole. If we end up with a zero- or negative-sized
> > AM> window then odd things might happen.
> >
> > truncate_mutex?
> >
>
> yes. hmm.

by which I mean "ext2 doesn't have a truncate_mutex".
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