From owner-freebsd-arch Sat May 12 14:17:28 2001 Delivered-To: freebsd-arch@freebsd.org Received: from perninha.conectiva.com.br (perninha.conectiva.com.br [200.250.58.156]) by hub.freebsd.org (Postfix) with ESMTP id 695FF37B423 for ; Sat, 12 May 2001 14:17:24 -0700 (PDT) (envelope-from riel@conectiva.com.br) Received: from burns.conectiva (burns.conectiva [10.0.0.4]) by perninha.conectiva.com.br (Postfix) with SMTP id 2CE5B16C5C for ; Sat, 12 May 2001 18:17:17 -0300 (EST) Received: (qmail 15923 invoked by uid 0); 12 May 2001 21:15:52 -0000 Received: from duckman.distro.conectiva (HELO duckman.conectiva.com.br) (root@10.0.17.2) by burns.conectiva with SMTP; 12 May 2001 21:15:52 -0000 Received: from localhost (riel@localhost) by duckman.conectiva.com.br (8.11.3/8.11.3) with ESMTP id f4CLHFK11130; Sat, 12 May 2001 18:17:16 -0300 X-Authentication-Warning: duckman.distro.conectiva: riel owned process doing -bs Date: Sat, 12 May 2001 18:17:15 -0300 (BRST) From: Rik van Riel X-X-Sender: To: Matt Dillon Cc: , , Subject: Re: on load control / process swapping In-Reply-To: <200105121721.f4CHLSS18553@earth.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, 12 May 2001, Matt Dillon wrote: > :Ahhh, so FreeBSD _does_ have a maxscan equivalent, just one that > :only kicks in when the system is under very heavy memory pressure. > : > :That explains why FreeBSD's thrashing detection code works... ;) > > Note that there is a big distinction between limiting the page > queue scan rate (which we do not do), and sleeping between full > scans (which we do). Limiting the page queue scan rate on a > page-by-page basis does not scale. Sleeping in between full queue > scans (in an extreme case) does scale. I'm not convinced it's doing a very useful thing, though ;) (see the rest of the email you replied to) Rik -- Linux MM bugzilla: http://linux-mm.org/bugzilla.shtml Virtual memory is like a game you can't win; However, without VM there's truly nothing to lose... http://www.surriel.com/ http://www.conectiva.com/ http://distro.conectiva.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message