From: Christoph Lameter <cl@linux.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kvm <kvm@vger.kernel.org>
Subject: Re: [PATCH 3/3] Provide control over unmapped pages
Date: Wed, 1 Dec 2010 09:01:32 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.00.1012010859020.2849@router.home> (raw)
In-Reply-To: <20101130142509.4f49d452.akpm@linux-foundation.org>
On Tue, 30 Nov 2010, Andrew Morton wrote:
> > +#define UNMAPPED_PAGE_RATIO 16
>
> Well. Giving 16 a name didn't really clarify anything. Attentive
> readers will want to know what this does, why 16 was chosen and what
> the effects of changing it will be.
The meaning is analoguous to the other zone reclaim ratio. But yes it
should be justified and defined.
> > Reviewed-by: Christoph Lameter <cl@linux.com>
>
> So you're OK with shoving all this flotsam into 100,000,000 cellphones?
> This was a pretty outrageous patchset!
This is a feature that has been requested over and over for years. Using
/proc/vm/drop_caches for fixing situations where one simply has too many
page cache pages is not so much fun in the long run.
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next prev parent reply other threads:[~2010-12-01 15:01 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-30 10:14 [PATCH 0/3] Series short description Balbir Singh
2010-11-30 10:15 ` [PATCH 1/3] Move zone_reclaim() outside of CONFIG_NUMA Balbir Singh
2010-11-30 19:18 ` Christoph Lameter
2010-11-30 22:23 ` Andrew Morton
[not found] ` <20101201043408.GE2746@balbir.in.ibm.com>
2010-12-01 5:21 ` Balbir Singh
2010-11-30 10:15 ` [PATCH 2/3] Refactor zone_reclaim Balbir Singh
2010-11-30 19:19 ` Christoph Lameter
2010-12-01 1:23 ` KAMEZAWA Hiroyuki
[not found] ` <20101201044634.GF2746@balbir.in.ibm.com>
2010-12-01 5:22 ` Balbir Singh
2010-12-01 8:59 ` KAMEZAWA Hiroyuki
2010-12-01 7:54 ` Minchan Kim
2010-11-30 10:16 ` [PATCH 3/3] Provide control over unmapped pages Balbir Singh
2010-11-30 19:21 ` Christoph Lameter
2010-11-30 22:25 ` Andrew Morton
[not found] ` <20101201045421.GG2746@balbir.in.ibm.com>
2010-12-01 5:22 ` Balbir Singh
2010-12-01 8:18 ` Minchan Kim
2010-12-01 15:01 ` Christoph Lameter [this message]
2010-12-02 1:22 ` KOSAKI Motohiro
2010-12-02 2:50 ` KAMEZAWA Hiroyuki
2010-12-02 7:01 ` Balbir Singh
2010-12-01 0:14 ` KOSAKI Motohiro
[not found] ` <20101201051632.GH2746@balbir.in.ibm.com>
2010-12-01 5:22 ` Balbir Singh
2010-12-01 1:32 ` KAMEZAWA Hiroyuki
[not found] ` <20101201051816.GI2746@balbir.in.ibm.com>
2010-12-01 5:22 ` Balbir Singh
2010-12-01 5:35 ` KAMEZAWA Hiroyuki
2010-12-01 6:40 ` Balbir Singh
2010-12-01 7:24 ` KAMEZAWA Hiroyuki
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