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Date: Fri, 10 Sep 2010 10:55:18 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Tejun Heo <htejun@...il.com> Cc: Stephane Eranian <eranian@...gle.com>, Eric Dumazet <eric.dumazet@...il.com>, linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org, davem@...emloft.net, fweisbec@...il.com, perfmon2-devel@...ts.sf.net, eranian@...il.com, robert.richter@....com, acme@...hat.com Subject: Re: [PATCH percpu#for-next] percpu: clear memory allocated with the km allocator On Fri, 2010-09-10 at 10:52 +0200, Tejun Heo wrote: > Percpu allocator should clear memory before returning it but the km > allocator forgot to do it. Fix it. > > Signed-off-by: Tejun Heo <tj@...nel.org> > Spotted-by: Peter Zijlstra <peterz@...radead.org> (fwiw, -tip uses Reported-by) Acked-by: Peter Zijlstra <peterz@...radead.org> > --- > mm/percpu-km.c | 6 +++++- > 1 files changed, 5 insertions(+), 1 deletions(-) > > diff --git a/mm/percpu-km.c b/mm/percpu-km.c > index 7037bc7..89633fe 100644 > --- a/mm/percpu-km.c > +++ b/mm/percpu-km.c > @@ -35,7 +35,11 @@ > > static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size) > { > - /* noop */ > + unsigned int cpu; > + > + for_each_possible_cpu(cpu) > + memset((void *)pcpu_chunk_addr(chunk, cpu, 0) + off, 0, size); > + > return 0; > } > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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