linux-kernel - Re: KSWAPD Algorithm

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Message-Id: <20081203162025.c2ed83b0.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 3 Dec 2008 16:20:25 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"wassim dagash" <wassim.dagash@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: KSWAPD Algorithm - 100% CPU

On Wed, 3 Dec 2008 09:04:49 +0200
"wassim dagash" <wassim.dagash@...il.com> wrote:

> Hi All,
> Description:
> I countered a weird problem with kswapd:
> it runs in some infinite loop trying to swap until order 10 of zone
> highmem is OK, While zone higmem (as I understand) has nothing to do
> with contiguous memory (cause there is no 1-1 mapping) which means
> kswapd will continue to try to balance order 10 of zone highmem
> forever (or until someone release a very large chunk of highmem).
> Can anyone please explain me the algorithm of kswapd and why it tries
> to balance order 10 of zone higmem ?
> 
At first, what version of the kernel ?

-Kame

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