From owner-freebsd-arch Wed May 16 13:27:26 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 5A23D37B423 for ; Wed, 16 May 2001 13:27:21 -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 D0B5A16B55 for ; Wed, 16 May 2001 16:59:51 -0300 (EST) Received: (qmail 24949 invoked by uid 0); 16 May 2001 19:58:29 -0000 Received: from duckman.distro.conectiva (HELO duckman.conectiva.com.br) (root@10.0.17.2) by burns.conectiva with SMTP; 16 May 2001 19:58:29 -0000 Received: from localhost (riel@localhost) by duckman.conectiva.com.br (8.11.3/8.11.3) with ESMTP id f4GJxpg06073; Wed, 16 May 2001 16:59:51 -0300 X-Authentication-Warning: duckman.distro.conectiva: riel owned process doing -bs Date: Wed, 16 May 2001 16:59:51 -0300 (BRST) From: Rik van Riel X-X-Sender: To: Matt Dillon Cc: Charles Randall , Roger Larsson , , , Subject: Re: RE: on load control / process swapping In-Reply-To: <200105161754.f4GHsCd73025@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 Wed, 16 May 2001, Matt Dillon wrote: > :There's one thing "wrong" with the drop-behind idea though; > :it penalises data even when it's still in core and we're > :reading it for the second or third time. > > It's not dropping the data, it's dropping the priority. And yes, it > does penalize the data somewhat. On the otherhand if the data happens > to still be in the cache and you scan it a second time, the page priority > gets bumped up But doesn't it get pushed _down_ again after the process has read the data? Or is this a part of the code outside of vm/* which I haven't read yet? regards, 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