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DateMon, 10 Oct 2005 16:35:03 +0200
FromJesper Juhl <>
SubjectRe: [PATCH] mm - implement swap prefetching
On 10/10/05, Con Kolivas <kernel@kolivas.org> wrote:
> Andrew could you please consider this for -mm
>
> Small changes to the style after suggestions from Pekka Enberg (thanks), and
> changed the default size of prefetch to gently increase with size of ram.
> Functionally this is the same code as vm-swap_prefetch-15 and I believe ready
> for a wider audience.
>

+	  What this will do on workstations is slowly bring back applications
+	  that have swapped out after memory intensive workloads back into
+	  physical ram if you have free ram at a later stage and the machine
+	  is relatively idle. This means that when you come back to your
+	  computer after leaving it idle for a while, applications will come
+	  to life faster. Note that your swap usage will appear to increase
+	  but these are cached pages, can be dropped freely by the vm, and it
+	  should stabilise around 50% swap usage.
+	
+	  Desktop users will most likely want to say Y.

How about a little note about the impact for server users as well?
You recommend that desktop users enable this, but you don't give any
recommendation for servers.


--
Jesper Juhl <jesper.juhl@gmail.com>
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