From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 14 Jan 2001 12:13:05 -0200 (BRST) From: Marcelo Tosatti Subject: Re: pre2 swap_out() changes In-Reply-To: <01011410512900.02185@oscar> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Ed Tomlinson Cc: linux-mm@kvack.org List-ID: On Sun, 14 Jan 2001, Ed Tomlinson wrote: > Hi, > > A couple of observations on the pre2/pre3 vm. It seems to start swapping out > very quicky but this does not seem to hurt. Once there is memory preasure > and swapin starts cpu utilization drops thru the roof - kernel compiles are > only able to drive the system at 10-20% (UP instead of 95-100%). Once the > system stops swapping (in) there are some side effects. Closing windows > in X becomes jerky (ie you see blocks get cleared and refreshed). If little > or no swapping has occured X is much faster. > > With the patch marcelo posted last night things change. Now It can use cpu > when swapping. It does seem to start swaping (in and out) faster but the > system remains more interactive than above. I still see the X effect though. > > Over all I think 2.4.0+marcelo's first patch(es) was fastest. There is still a critical thing to be fixed which is the swapout selection path (which is probably what is causing your problem in X) Anyway, thanks for the report. -- 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/