From owner-freebsd-current@FreeBSD.ORG Sat May 10 10:50:51 2003 Return-Path: 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 6572437B401 for ; Sat, 10 May 2003 10:50:51 -0700 (PDT) Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 949EA43FBF for ; Sat, 10 May 2003 10:50:50 -0700 (PDT) (envelope-from robert@fledge.watson.org) Received: from fledge.watson.org (fledge.pr.watson.org [192.0.2.3]) by fledge.watson.org (8.12.9/8.12.9) with SMTP id h4AHokeZ042923; Sat, 10 May 2003 13:50:46 -0400 (EDT) (envelope-from robert@fledge.watson.org) Date: Sat, 10 May 2003 13:50:45 -0400 (EDT) From: Robert Watson X-Sender: robert@fledge.watson.org To: Paul Richards In-Reply-To: <1052585648.27195.19.camel@cf.freebsd-services.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: Soeren Schmidt cc: current@FreeBSD.ORG Subject: Re: Interrupt latency problems X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 May 2003 17:50:51 -0000 On 10 May 2003, Paul Richards wrote: > Is everyone seeing this? If not then perhaps we can narrow down the > problem and look at getting things improved before 5-stable, because if > it stays like this it's not really what I'd consider useable. If you look at the 5.2-RELEASE feature requirements, you'll see that they include fine-grained locking for ATA to mitigate this problem. I know there's work-in-progress to look at issues relating to CAM and the various storage drivers as well. You can take a look at the driver status page to see the status of various hardware drivers -- http://www.FreeBSD.org/projects/busdma/ I believe. It's grown from "do drivers handle busdma" to "which drivers are MPsafe to various degrees, 64-bit safe, etc". Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Network Associates Laboratories