From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 5 Jul 2002 21:11:26 -0300 (BRT) From: Rik van Riel Subject: Re: vm lock contention reduction In-Reply-To: <3D26304C.51FAE560@zip.com.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: William Lee Irwin III , Andrea Arcangeli , "linux-mm@kvack.org" , Linus Torvalds List-ID: On Fri, 5 Jul 2002, Andrew Morton wrote: > William Lee Irwin III wrote: > > On Thu, Jul 04, 2002 at 07:18:34PM -0700, Andrew Morton wrote: > > > Of course, that change means that we wouldn't be able to throttle > > > page allocators against IO any more, and we'd have to do something > > > smarter. What a shame ;) > > > > This is actually necessary IMHO. Some testing I've been able to do seems > > to reveal the current throttling mechanism as inadequate. > > I don't think so. If you're referring to the situation where your > 4G machine had 3.5G dirty pages without triggering writeback. > > That's not a generic problem. But it is, mmap() and anonymous memory don't trigger writeback. regards, Rik -- Bravely reimplemented by the knights who say "NIH". http://www.surriel.com/ http://distro.conectiva.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-mm.org/