From: David Rientjes <rientjes@google.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Michal Hocko <mhocko@kernel.org>,
Mel Gorman <mgorman@techsingularity.net>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH 1/8] mm, compaction: don't isolate PageWriteback pages in MIGRATE_SYNC_LIGHT mode
Date: Tue, 19 Jul 2016 15:21:20 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.10.1607191520580.19940@chino.kir.corp.google.com> (raw)
In-Reply-To: <20160718112302.27381-2-vbabka@suse.cz>
On Mon, 18 Jul 2016, Vlastimil Babka wrote:
> From: Hugh Dickins <hughd@google.com>
>
> At present MIGRATE_SYNC_LIGHT is allowing __isolate_lru_page() to
> isolate a PageWriteback page, which __unmap_and_move() then rejects
> with -EBUSY: of course the writeback might complete in between, but
> that's not what we usually expect, so probably better not to isolate it.
>
> When tested by stress-highalloc from mmtests, this has reduced the number of
> page migrate failures by 60-70%.
>
> Signed-off-by: Hugh Dickins <hughd@google.com>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Rientjes <rientjes@google.com>
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next prev parent reply other threads:[~2016-07-19 22:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-18 11:22 [PATCH 0/8] compaction-related cleanups v4 Vlastimil Babka
2016-07-18 11:22 ` [PATCH 1/8] mm, compaction: don't isolate PageWriteback pages in MIGRATE_SYNC_LIGHT mode Vlastimil Babka
2016-07-19 22:21 ` David Rientjes [this message]
2016-07-18 11:22 ` [PATCH 2/8] mm, page_alloc: set alloc_flags only once in slowpath Vlastimil Babka
2016-07-18 11:27 ` Michal Hocko
2016-07-19 22:28 ` David Rientjes
2016-07-21 7:00 ` Vlastimil Babka
2016-07-18 11:22 ` [PATCH 3/8] mm, page_alloc: don't retry initial attempt " Vlastimil Babka
2016-07-18 11:29 ` Michal Hocko
2016-07-18 11:34 ` Vlastimil Babka
2016-07-19 22:36 ` David Rientjes
2016-07-20 15:25 ` Vlastimil Babka
2016-07-20 22:00 ` David Rientjes
2016-07-18 11:22 ` [PATCH 4/8] mm, page_alloc: restructure direct compaction handling " Vlastimil Babka
2016-07-19 22:50 ` David Rientjes
2016-07-20 16:02 ` Vlastimil Babka
2016-07-18 11:22 ` [PATCH 5/8] mm, page_alloc: make THP-specific decisions more generic Vlastimil Babka
2016-07-19 23:10 ` David Rientjes
2016-07-21 7:13 ` Vlastimil Babka
2016-07-18 11:23 ` [PATCH 6/8] mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations Vlastimil Babka
2016-07-18 11:23 ` [PATCH 7/8] mm, compaction: introduce direct compaction priority Vlastimil Babka
2016-07-18 11:23 ` [PATCH 8/8] mm, compaction: simplify contended compaction handling Vlastimil Babka
2016-07-18 11:30 ` [PATCH 0/8] compaction-related cleanups v4 Michal Hocko
2016-07-18 15:41 ` Mel Gorman
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