From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [patch v2 3/3] mm: page_alloc: fair zone allocator policy
Date: Fri, 16 Aug 2013 15:24:40 -0600 [thread overview]
Message-ID: <520E9898.7040107@wwwdotorg.org> (raw)
In-Reply-To: <20130816201814.GA26409@cmpxchg.org>
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@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!
>
> 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@nvidia•com>
next prev parent reply other threads:[~2013-08-16 21:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1375457846-21521-1-git-send-email-hannes@cmpxchg.org>
[not found] ` <1375457846-21521-4-git-send-email-hannes@cmpxchg.org>
[not found] ` <20130807145828.GQ2296@suse.de>
[not found] ` <20130807153743.GH715@cmpxchg.org>
[not found] ` <20130808041623.GL1845@cmpxchg.org>
[not found] ` <87haepblo2.fsf@kernel.org>
2013-08-16 20:18 ` [patch v2 3/3] mm: page_alloc: fair zone allocator policy Johannes Weiner
2013-08-16 21:24 ` Stephen Warren [this message]
2013-08-16 21:52 ` Kevin Hilman
2013-08-19 0:48 ` Stephen Rothwell
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