From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id 948236B004D for ; Mon, 10 Aug 2009 13:59:51 -0400 (EDT) Message-ID: <4A805FFF.7090805@redhat.com> Date: Mon, 10 Aug 2009 13:59:27 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: New patch for Linux References: <4353.132.70.1.75.1249546446.squirrel@webmail.cs.biu.ac.il> <1249548768.32113.68.camel@twins> <1466.77.126.168.195.1249763409.squirrel@webmail.cs.biu.ac.il> <4A7E03B4.8010503@redhat.com> <1085.77.126.199.142.1249842457.squirrel@webmail.cs.biu.ac.il> <4A803F62.2050006@redhat.com> <1703.77.126.199.142.1249923286.squirrel@webmail.cs.biu.ac.il> In-Reply-To: <1703.77.126.199.142.1249923286.squirrel@webmail.cs.biu.ac.il> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: wiseman@macs.biu.ac.il Cc: Peter Zijlstra , linux-mm@kvack.org, hannes@cmpxchg.org List-ID: Yair Wiseman wrote: > It will work for larger amounts of memory. We just have to choose a longer time slice. Sounds simple, but in practice you will run into the fact that users don't really mind a 1 second latency during thrashing, but the 1 minute (or more) latencies that may be required for this scheme to scale to very large memory systems may be totally unacceptable. > I will try to find a newer > version, but I do not see the difference in this case. > We just suggest to replace the LRU-token approach. I have no problem with replacing the LRU-token, if we can find something that is shown to work better. BSD style process suspension has been tried many times on Linux and it never seemed to work right. Maybe your approach can be made to automatically work right on machines of all memory sizes, but it would be good to demonstrate that before committing to such a change. -- All rights reversed. -- 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-mm.org/ . Don't email: email@kvack.org