From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
mgorman@techsingularity.net, Minchan Kim <minchan@kernel.org>,
Alexander Potapenko <glider@google.com>,
Hugh Dickins <hughd@google.com>, Michal Hocko <mhocko@kernel.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v2 1/7] mm/compaction: split freepages without holding the zone lock
Date: Fri, 17 Jun 2016 16:27:53 +0900 [thread overview]
Message-ID: <20160617072752.GB810@js1304-P5Q-DELUXE> (raw)
In-Reply-To: <20160615022731.GB19863@js1304-P5Q-DELUXE>
On Wed, Jun 15, 2016 at 11:27:31AM +0900, Joonsoo Kim wrote:
> On Tue, Jun 14, 2016 at 03:10:21PM -0400, Sasha Levin wrote:
> > On 06/14/2016 01:52 AM, Joonsoo Kim wrote:
> > > On Mon, Jun 13, 2016 at 04:31:15PM -0400, Sasha Levin wrote:
> > >> > On 05/25/2016 10:37 PM, js1304@gmail.com wrote:
> > >>> > > From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> > >>> > >
> > >>> > > 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 <iamjoonsoo.kim@lge.com>
> > >> >
> > >> > Hey Joonsoo,
> > > Hello, Sasha.
> > >> >
> > >> > 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.
Hello, Sasha.
You are right! Minchan found the bug in this patch! I will send
updated patch soon.
http://marc.info/?i=20160616100932.GS17127%40bbox
Thanks.
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prev parent reply other threads:[~2016-06-17 7:25 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-26 2:37 js1304
2016-05-26 2:37 ` [PATCH v2 2/7] mm/page_owner: initialize page owner " js1304
2016-06-03 10:23 ` Vlastimil Babka
2016-06-03 12:47 ` Joonsoo Kim
2016-06-06 15:20 ` Vlastimil Babka
2016-05-26 2:37 ` [PATCH v2 3/7] mm/page_owner: copy last_migrate_reason in copy_page_owner() js1304
2016-06-06 13:31 ` Vlastimil Babka
2016-05-26 2:37 ` [PATCH v2 4/7] mm/page_owner: introduce split_page_owner and replace manual handling js1304
2016-05-26 2:37 ` [PATCH v2 5/7] tools/vm/page_owner: increase temporary buffer size js1304
2016-05-26 2:37 ` [PATCH v2 6/7] mm/page_owner: use stackdepot to store stacktrace js1304
2016-06-06 13:56 ` Michal Hocko
2016-06-17 7:25 ` Joonsoo Kim
2016-06-17 9:55 ` Michal Hocko
2016-06-20 6:58 ` Joonsoo Kim
2016-06-06 14:51 ` Vlastimil Babka
2016-06-20 13:04 ` Alexander Potapenko
2016-05-26 2:37 ` [PATCH v2 7/7] mm/page_alloc: introduce post allocation processing on page allocator js1304
2016-06-06 15:21 ` Vlastimil Babka
2016-06-17 7:55 ` Joonsoo Kim
2016-06-03 10:10 ` [PATCH v2 1/7] mm/compaction: split freepages without holding the zone lock Vlastimil Babka
2016-06-03 12:45 ` Joonsoo Kim
2016-06-06 15:19 ` Vlastimil Babka
2016-06-13 20:31 ` Sasha Levin
2016-06-14 5:52 ` Joonsoo Kim
2016-06-14 19:10 ` Sasha Levin
2016-06-15 2:27 ` Joonsoo Kim
2016-06-17 7:27 ` Joonsoo Kim [this message]
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