From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262080AbULLO2a (ORCPT ); Sun, 12 Dec 2004 09:28:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262081AbULLO2a (ORCPT ); Sun, 12 Dec 2004 09:28:30 -0500 Received: from webmail.sub.ru ([213.247.139.22]:43529 "HELO techno.sub.ru") by vger.kernel.org with SMTP id S262080AbULLO21 (ORCPT ); Sun, 12 Dec 2004 09:28:27 -0500 From: Mikhail Ramendik To: linux-kernel@vger.kernel.org Subject: 2.6.10-rc3: kswapd eats CPU on start of memory-eating task Date: Sun, 12 Dec 2004 17:28:16 +0300 User-Agent: KMail/1.7.1 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200412121728.16968.mr@ramendik.ru> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, With kernel 2.6.10-rc3 and 256 M RAM, when I start a task taht eats a ot of RAM (for example, viewing a big TIFF file; also tested with a synthetic "eater"), in the resulting swapping process kswapd tahes quite a bit of CPU time. The computer becomes extremely unresponsive, the clock (in icewm) stops for periods of time up to a minute). And the task startup itself is somewhaat slow. I have checked both 2.6.8.1 and 2.6.9 for comparison, and they fare a lot better. The CPU hogging is not there, the computer is much more responsive, and the task starts faster. -- Yours, Mikhail Ramendik