From owner-freebsd-current Fri Oct 29 17:52:59 1999 Delivered-To: freebsd-current@freebsd.org Received: from cs.rice.edu (cs.rice.edu [128.42.1.30]) by hub.freebsd.org (Postfix) with ESMTP id 2D52C14A19 for ; Fri, 29 Oct 1999 17:52:48 -0700 (PDT) (envelope-from alc@cs.rice.edu) Received: (from alc@localhost) by cs.rice.edu (8.9.0/8.9.0) id TAA24620; Fri, 29 Oct 1999 19:52:43 -0500 (CDT) Date: Fri, 29 Oct 1999 19:52:43 -0500 From: Alan Cox To: Bernd Walter Cc: current@freebsd.org Subject: Re: copy-on-write optimized faults Message-ID: <19991029195243.E28768@cs.rice.edu> References: <19991029144743.Z16685@cs.rice.edu> <19991030004740.A66148@cicely7.cicely.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.5us In-Reply-To: <19991030004740.A66148@cicely7.cicely.de>; from Bernd Walter on Sat, Oct 30, 1999 at 12:47:40AM +0200 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, Oct 30, 1999 at 12:47:40AM +0200, Bernd Walter wrote: > > 307625181 copy-on-write faults > 26 copy-on-write optimized faults Thanks to Bernd and everyone else who has responded. Unless someone reports a case where the old "optimization" gets applied more often than 1 in ten million copy-on-write faults, I'm going to remove the old code in a few days. At this frequency, the cost of deciding whether or not to apply the optimization on every copy-on-write fault is greater than what is saved those 26 times it is applied. Alan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message