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Date: Tue, 28 Aug 2001 13:01:10 -0700 (PDT)
Message-Id: <20010828.130110.26275634.davem@redhat.com>
To: ak@suse.de
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: page_launder() on 2.4.9/10 issue
From: "David S. Miller" <davem@redhat.com>
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   From: Andi Kleen <ak@suse.de>
   Date: 28 Aug 2001 21:14:15 +0200
   
   At least something seems to be broken in it. I did run some 900MB processes
   on a 512MB machine with 2.4.9 and kswapd took between 70 and 90% of the CPU
   time.

That's all swapmap lookup stupidity, you'll see __get_swap_page()
near the top of your profiles.  The algorithm is just sucky.

Later,
David S. Miller
davem@redhat.com