On Tue, Jun 14, 2016 at 03:10:21PM -0400, Sasha Levin wrote:

On 06/14/2016 01:52 AM, Joonsoo Kim wrote:

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On Mon, Jun 13, 2016 at 04:31:15PM -0400, Sasha Levin wrote:

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On 05/25/2016 10:37 PM, js1304@gmail.com wrote:

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From: Joonsoo Kim <redacted>

We don't need to split freepages with holding the zone lock. It will cause
more contention on zone lock so not desirable.

Signed-off-by: Joonsoo Kim <redacted>

Hey Joonsoo,

Hello, Sasha.

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I'm seeing the following corruption/crash which seems to be related to
this patch:

Could you tell me why you think that following corruption is related
to this patch? list_del() in __isolate_free_page() is unchanged part.

Before this patch, we did it by split_free_page() ->
__isolate_free_page() -> list_del(). With this patch, we do it by
calling __isolate_free_page() directly.

I haven't bisected it, but it's the first time I see this issue and this
commit seems to have done related changes that might cause this.

I can go ahead with bisection if you don't think it's related.

Hmm... I can't find a bug in this patch for now. There are more candidates
on this area hat changed by me and it would be very helpful if you can
do bisection.

Thanks.

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