From: Andrew Morton <akpm@osdl.org>
To: Con Kolivas <kernel@kolivas.org>
Cc: linux-kernel@vger.kernel.org, ck@vds.kolivas.org
Subject: Re: [PATCH] vm - swap_prefetch v12
Date: Thu, 29 Sep 2005 14:54:00 -0700 [thread overview]
Message-ID: <20050929145400.1cc2b748.akpm@osdl.org> (raw)
In-Reply-To: <200509300115.33060.kernel@kolivas.org>
Con Kolivas <kernel@kolivas.org> wrote:
>
> Once pages have been added to the swapped list, a timer is started, testing
> for conditions suitable to prefetch swap pages every 5 seconds. Suitable
> conditions are defined as lack of swapping out or in any pages, and no
> watermark tests failing. Significant amounts of dirtied ram also prevent
> prefetching. It then checks that we have spare ram looking for at
> least 3* pages_high free per zone and if it succeeds that will prefetch
> pages from swap.
Did you consider poking around in gendisk.disk_stats to determine whether
the swap disk(s) are idleish?
next prev parent reply other threads:[~2005-09-29 21:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-29 15:15 Con Kolivas
2005-09-29 21:54 ` Andrew Morton [this message]
2005-09-29 23:12 ` Con Kolivas
2005-09-29 23:24 ` Andrew Morton
2005-09-29 23:42 ` Con Kolivas
2005-09-29 23:52 ` Andrew Morton
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