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DateSat, 5 Apr 2008 09:23:23 +0200
FromJens Axboe <>
SubjectRe: [PATCH] splice: use mapping_gfp_mask
On Fri, Apr 04 2008, Oliver Pinter wrote:
> hi all!> > this patch for 2.6.22.y ?> > if i good see, the __generic_file_splice_read bring out to 2.6.22 ..
> > http://repo.or.cz/w/linux-2.6.22.y-op-patches.git> http://repo.or.cz/w/linux-2.6.22.y-op.git

Loop isn't affected before 2.6.23, so while it doesn't hurt to put it
into 2.6.22, there's not much point either. 2.6.23 and 24 need the
patch.


> > On 4/4/08, Jens Axboe <jens.axboe@oracle.com> wrote:
> > On Thu, Apr 03 2008, Hugh Dickins wrote:> > > The loop block driver is careful to mask __GFP_IO|__GFP_FS out of its
> > > mapping_gfp_mask, to avoid hangs under memory pressure.  But nowadays
> > > it uses splice, usually going through __generic_file_splice_read.  That
> > > must use mapping_gfp_mask instead of GFP_KERNEL to avoid those hangs.
> > >> > > Signed-off-by: Hugh Dickins <hugh@veritas.com>
> > > ---
> > > Ought to go into 2.6.25.  For 2.6.23 and 2.6.24 stable?  Well, I've
> > > not actually seen this hang on any of these, though presumably it's
> > > lurking there.  Where I did see it, and test the fix, was 2.6.25-rc5-mm1:
> > > whose SLUB had a disturbing predilection (since corrected) for order-4
> > > allocations, even when allocating radix tree nodes.> >> > Thanks Hugh, definitely correct! I see it's already merged, so all is
> > well.> >> > --> > Jens Axboe> >> > --> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> >
> 
> 
> -- 
> Thanks,
> Oliver

-- 
Jens Axboe

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