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From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@kernel.dk,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
kosaki.motohiro@jp.fujitsu.com, cl@linux.com,
kamezawa.hiroyu@jp.fujitsu.com
Subject: Re: [PATCH 3/3] Provide control over unmapped pages (v4)
Date: Fri, 28 Jan 2011 16:48:33 +0530 [thread overview]
Message-ID: <20110128111833.GD5054@balbir.in.ibm.com> (raw)
In-Reply-To: <AANLkTikw_j0JJVqEsj1xThoashiOARg+8BgcLKrvkV3U@mail.gmail.com>
* MinChan Kim <minchan.kim@gmail.com> [2011-01-28 16:24:19]:
> >
> > But the assumption for LRU order to change happens only if the page
> > cannot be successfully freed, which means it is in some way active..
> > and needs to be moved no?
>
> 1. holded page by someone
> 2. mapped pages
> 3. active pages
>
> 1 is rare so it isn't the problem.
> Of course, in case of 3, we have to activate it so no problem.
> The problem is 2.
>
2 is a problem, but due to the size aspects not a big one. Like you
said even lumpy reclaim affects it. May be the reclaim code could
honour may_unmap much earlier.
--
Three Cheers,
Balbir
next prev parent reply other threads:[~2011-01-28 11:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-25 5:10 [PATCH 1/2] Refactor zone_reclaim code (v4) Balbir Singh
2011-01-25 5:10 ` [PATCH 3/3] Provide control over unmapped pages (v4) Balbir Singh
2011-01-26 16:57 ` Christoph Lameter
2011-01-26 17:43 ` Balbir Singh
2011-01-26 23:12 ` Minchan Kim
2011-01-28 2:56 ` Balbir Singh
2011-01-28 5:44 ` Minchan Kim
2011-01-28 6:48 ` Balbir Singh
2011-01-28 7:24 ` Minchan Kim
2011-01-28 7:56 ` KAMEZAWA Hiroyuki
2011-01-28 8:19 ` Balbir Singh
2011-01-28 8:17 ` KAMEZAWA Hiroyuki
2011-01-28 12:02 ` Balbir Singh
2011-01-28 15:20 ` Christoph Lameter
2011-01-30 23:58 ` KAMEZAWA Hiroyuki
2011-01-31 4:37 ` Balbir Singh
2011-01-28 11:18 ` Balbir Singh [this message]
2011-02-10 5:33 ` Minchan Kim
2011-02-10 5:41 ` Minchan Kim
2011-02-13 17:33 ` Balbir Singh
2011-02-16 23:45 ` Minchan Kim
2011-01-25 5:15 ` [PATCH 1/2] Refactor zone_reclaim code (v4) Balbir Singh
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