From: Andi Kleen <ak@suse.de>
To: Christoph Lameter <clameter@sgi.com>
Cc: akpm@osdl.org, schamp@sgi.com, linux-mm@kvack.org
Subject: Re: ZVC/zone_reclaim: Leave 1% of unmapped pagecache pages for file I/O
Date: Fri, 30 Jun 2006 12:19:19 +0200 [thread overview]
Message-ID: <200606301219.19473.ak@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0606291949320.30754@schroedinger.engr.sgi.com>
On Friday 30 June 2006 04:51, Christoph Lameter wrote:
> It turns out that it is advantageous to leave a small portion of
> unmapped file backed pages if a zone is overallocated.
>
> This allows recently used file I/O buffers to stay on the node and
> reduces the times that zone reclaim is invoked if file I/O occurs
> when we run out of memory in a zone.
Shouldn't that be some kind of tunable? Magic numbers are bad.
-Andi
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next prev parent reply other threads:[~2006-06-30 10:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-30 2:51 ZVC/zone_reclaim: Leave 1% of unmapped pagecache pages for file I/O Christoph Lameter
2006-06-30 3:07 ` Andrew Morton
2006-06-30 6:08 ` Christoph Lameter
2006-06-30 10:19 ` Andi Kleen [this message]
2006-06-30 21:14 ` Christoph Lameter
2006-06-30 23:38 ` Andrew Morton
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