From: Con Kolivas <kernel@kolivas.org>
To: Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH] vm - swap_prefetch v12
Date: Fri, 30 Sep 2005 09:12:58 +1000
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On Fri, 30 Sep 2005 07:54 am, Andrew Morton wrote:
> 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?

I didn't know where to look for that info. Thanks! I'm open to *any* 
suggestions and I'll look into it as I can't take this code much further 
without outside help.

Cheers,
Con
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