Messages in this thread | | | From | Kevin Hilman <> | Subject | Re: [patch v2 3/3] mm: page_alloc: fair zone allocator policy | Date | Fri, 16 Aug 2013 14:52:11 -0700 |
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Johannes Weiner <hannes@cmpxchg.org> writes:
> Hi Kevin, > > On Fri, Aug 16, 2013 at 10:17:01AM -0700, Kevin Hilman wrote: >> Johannes Weiner <hannes@cmpxchg.org> writes: >> > On Wed, Aug 07, 2013 at 11:37:43AM -0400, Johannes Weiner wrote: >> > Subject: [patch] mm: page_alloc: use vmstats for fair zone allocation batching >> > >> > Avoid dirtying the same cache line with every single page allocation >> > by making the fair per-zone allocation batch a vmstat item, which will >> > turn it into batched percpu counters on SMP. >> > >> > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> >> >> I bisected several boot failures on various ARM platform in >> next-20130816 down to this patch (commit 67131f9837 in linux-next.) >> >> Simply reverting it got things booting again on top of -next. Example >> boot crash below. > > Thanks for the bisect and report!
You're welcome. Thanks for the quick fix!
> I deref the percpu pointers before initializing them properly. It > didn't trigger on x86 because the percpu offset added to the pointer > is big enough so that it does not fall into PFN 0, but it probably > ended up corrupting something... > > Could you try this patch on top of linux-next instead of the revert?
Yup, that change fixes it.
Tested-by: Kevin Hilman <khilman@linaro.org>
Kevin
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