From owner-freebsd-current Thu Oct 24 23:16:15 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9555937B401 for ; Thu, 24 Oct 2002 23:16:14 -0700 (PDT) Received: from opiate.thirteenandtwo.org (CPE0030ab0ef2bb.cpe.net.cable.rogers.com [24.103.202.201]) by mx1.FreeBSD.org (Postfix) with ESMTP id 64BDA43E3B for ; Thu, 24 Oct 2002 23:16:13 -0700 (PDT) (envelope-from munish@opiate.thirteenandtwo.org) Received: from opiate.thirteenandtwo.org (munish@localhost.thirteenandtwo.org [127.0.0.1]) by opiate.thirteenandtwo.org (8.12.6/8.12.6) with ESMTP id g9P6GAG5073185 for ; Fri, 25 Oct 2002 02:16:10 -0400 (EDT) (envelope-from munish@opiate.thirteenandtwo.org) Received: (from munish@localhost) by opiate.thirteenandtwo.org (8.12.6/8.12.6/Submit) id g9P6G9sT073184 for current@FreeBSD.ORG; Fri, 25 Oct 2002 02:16:09 -0400 (EDT) Date: Fri, 25 Oct 2002 02:16:09 -0400 From: Munish Chopra To: current@FreeBSD.ORG Subject: Re: is src/UPDATING up to date Message-ID: <20021025061609.GC5218@opiate.thirteenandtwo.org> Mail-Followup-To: current@FreeBSD.ORG References: <7891656.1035530926@sauron> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7891656.1035530926@sauron> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 2002-10-25 07:28 +0000, Mathieu Arnold wrote: > Hi > > I was twiddling with my yesterday's current, I was trying to make release > to see how things were going, and I saw at the top of UPDATING that : > > In addition, IDE write caching is currently disabled by default > due to on-going concerns about disk write order and file system > integrity. Re-enabling write caching can substantially improve > performance. > This part of the performance disclaimer has been untrue for a while now. It is once again enabled by default. > I looked at ata(4), told me about hw.ata.wc, which was supposed to be > enabled by default, and it was, so, my question is, is the comment above > still true, and how do I enable write cache if it is, if it's not true any > more, maybe it should be removed. > As stated, it's untrue. You can check the status of write caching by using the sysctl(8) facility. You're looking for hw.ata.wc. It'd probably be a good idea for someone to nuke that paragraph... -- Munish Chopra To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message