From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <39E25034.6B1203CE@sgi.com> Date: Mon, 09 Oct 2000 16:09:40 -0700 From: Rajagopal Ananthanarayanan MIME-Version: 1.0 Subject: Write-back/VM question Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: riel@conectiva.com.br Cc: linux-mm@kvack.org List-ID: One of the behaviors of the new VM seems to be that it starts I/O on a written page fairly early. This "aggressive" write is great for streaming I/O, but seems to have a penalty when the application has write-locality. Dbench is a one case, which is write intensive and a lot of the writes are to a previously written page. I'm not exactly certain why starting write-out early would cause problems, but I've a couple of quick questions: 1. Is the page locked during write-out? 2. Is there a tuneable that I can use to control write-back behaviour? thanks! -- -------------------------------------------------------------------------- Rajagopal Ananthanarayanan ("ananth") Member Technical Staff, SGI. -------------------------------------------------------------------------- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/