From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 16 Aug 2000 16:09:30 -0300 (BRST) From: Rik van Riel Subject: Re: new vm - OK but not THAT great In-Reply-To: <399AD517.656E4279@ucla.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Benjamin Redelings Cc: linux-mm@kvack.org, linux-kernel@vger.rutgers.edu List-ID: On Wed, 16 Aug 2000, Benjamin Redelings wrote: > I tested Rik's latest, tuned, VM code on my machine at home. Sorry > this isn't more detailed - I have to do some comparisons later. > However, I DO notice some problems: when I run netscape > and a few other apps, performance is OK, but when I then run > 'tar -xf linux-2.4.0-pre4.tar' preformance drops. Indeed, I've seen this here as well. I have some ideas on fixing this and once I figure out all the details I'll implement and tune them. (but first, I have to fix the SMP bug where __alloc_pages hands out a page that has one of the PG_(in)active_* bits set...) > Secondly, programs like xfs, which are NOT RUNNING AT ALL, > do not get swapped out as much as vanilla pre7-4. > So, the page aging code does not appear to be helping as > much as it should. Swapping seems, in some sense, to not as > good as pre7-4... This is also something which needs to be tuned more. Remember that you're working with a VM patch that received only about 4 hours of tuning ;) I hope any of the other VM hackers will use the quiet period around the vger problems to help tune this VM patch a bit ;) regards, Rik -- "What you're running that piece of shit Gnome?!?!" -- Miguel de Icaza, UKUUG 2000 http://www.conectiva.com/ http://www.surriel.com/ -- 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/