On 08/16/2013 02:18 PM, Johannes Weiner wrote: > Hi Kevin, > > On Fri, Aug 16, 2013 at 10:17:01AM -0700, Kevin Hilman wrote: >> Johannes Weiner <hannes@xxxxxxxxxxx> 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@xxxxxxxxxxx> >> >> 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! > > 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? That patch, Tested-by: Stephen Warren <swarren@xxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>