Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath

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To: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Tue, 13 May 2014 20:24:32 +0200
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Jan Kara <jack@xxxxxxx>, Michal Hocko <mhocko@xxxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, Linux-FSDevel <linux-fsdevel@xxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>
In-reply-to: <20140513181852.GB12123@redhat.com>
User-agent: Mutt/1.5.21 (2012-12-30)

On Tue, May 13, 2014 at 08:18:52PM +0200, Oleg Nesterov wrote:
> 
> In short: I am totally confused and most probably misunderstood you ;)

Yeah, my bad, I got myself totally confused and it seems to spread fast.
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References:
- [PATCH 00/19] Misc page alloc, shmem, mark_page_accessed and page_waitqueue optimisations v3r33
  - From: Mel Gorman
- [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
  - From: Mel Gorman
- Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
  - From: Mel Gorman
- Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
  - From: Peter Zijlstra
- Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
  - From: Paul E. McKenney
- Re: [PATCH 19/19] mm: filemap: Avoid unnecessary barries and waitqueue lookups in unlock_page fastpath
  - From: Oleg Nesterov

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