From owner-freebsd-current@FreeBSD.ORG Sat Nov 15 18:43:39 2014 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C549BD28 for ; Sat, 15 Nov 2014 18:43:39 +0000 (UTC) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "troutmask.apl.washington.edu", Issuer "troutmask.apl.washington.edu" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 8B4D893C for ; Sat, 15 Nov 2014 18:43:39 +0000 (UTC) Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu [127.0.0.1]) by troutmask.apl.washington.edu (8.14.9/8.14.9) with ESMTP id sAFIhWgR030395 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Sat, 15 Nov 2014 10:43:32 -0800 (PST) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.14.9/8.14.9/Submit) id sAFIhWXB030394 for freebsd-current@freebsd.org; Sat, 15 Nov 2014 10:43:32 -0800 (PST) (envelope-from sgk) Date: Sat, 15 Nov 2014 10:43:32 -0800 From: Steve Kargl To: freebsd-current@freebsd.org Subject: Finding a rogue src/sys commit with bisection? Message-ID: <20141115184332.GA30344@troutmask.apl.washington.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 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, 15 Nov 2014 18:43:39 -0000 Before I totally hose by /usr/src directory, does anyone have some guidelines on doing a binary search for a rogue commit in /usr/src/sys?. Either cam or usb (or acpi?) has broken the ability to remove a external USB device once it is plugged into a usb port on my Dell Latitude D530 laptop. I know that a good kernel can be built with r271273 and a bad kernel comes from (nearly) top of tree at r274456. I assume I need to do somthing along the lines % cd /usr/src/sys % svn merge -r 274456:272864 (half way point between good and bad) (build kernel and test) % cd /usr/src/sys % svn revert -R . (assume 272864 builds working kernel) % svn merge -r 274456:273660 (1/2 point between 272864 and 274456). Rinse and repeat. -- Steve