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Re: [PATCH 1/8] mm, compaction: don't isolate PageWriteback pages in MIGRATE_SYNC_LIGHT mode

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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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[PATCH 0/8] compaction-related cleanups v4 Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
  [PATCH 7/8] mm, compaction: introduce direct compaction priority Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
  [PATCH 4/8] mm, page_alloc: restructure direct compaction handling in slowpath Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
    Re: [PATCH 4/8] mm, page_alloc: restructure direct compaction handling  in slowpath David Rientjes <rientjes@google.com> - 2016-07-20 01:00 +0200
      Re: [PATCH 4/8] mm, page_alloc: restructure direct compaction  handling in slowpath Vlastimil Babka <vbabka@suse.cz> - 2016-07-20 18:10 +0200
  [PATCH 5/8] mm, page_alloc: make THP-specific decisions more generic Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
    Re: [PATCH 5/8] mm, page_alloc: make THP-specific decisions more  generic David Rientjes <rientjes@google.com> - 2016-07-20 01:20 +0200
      Re: [PATCH 5/8] mm, page_alloc: make THP-specific decisions more  generic Vlastimil Babka <vbabka@suse.cz> - 2016-07-21 09:20 +0200
  [PATCH 6/8] mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
  [PATCH 1/8] mm, compaction: don't isolate PageWriteback pages in MIGRATE_SYNC_LIGHT mode Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
    Re: [PATCH 1/8] mm, compaction: don't isolate PageWriteback pages  in MIGRATE_SYNC_LIGHT mode David Rientjes <rientjes@google.com> - 2016-07-20 00:30 +0200
  [PATCH 2/8] mm, page_alloc: set alloc_flags only once in slowpath Vlastimil Babka <vbabka@suse.cz> - 2016-07-18 13:30 +0200
    Re: [PATCH 2/8] mm, page_alloc: set alloc_flags only once in  slowpath David Rientjes <rientjes@google.com> - 2016-07-20 00:30 +0200
      Re: [PATCH 2/8] mm, page_alloc: set alloc_flags only once in slowpath Vlastimil Babka <vbabka@suse.cz> - 2016-07-21 09:10 +0200
  Re: [PATCH 0/8] compaction-related cleanups v4 Michal Hocko <mhocko@kernel.org> - 2016-07-18 13:40 +0200
  Re: [PATCH 0/8] compaction-related cleanups v4 Mel Gorman <mgorman@techsingularity.net> - 2016-07-18 17:50 +0200

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