From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58499) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZQLAk-000085-3l for qemu-devel@nongnu.org; Fri, 14 Aug 2015 16:01:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZQLAg-0001i4-Rf for qemu-devel@nongnu.org; Fri, 14 Aug 2015 16:01:50 -0400 Received: from mail-wi0-f176.google.com ([209.85.212.176]:34145) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZQLAg-0001hu-M3 for qemu-devel@nongnu.org; Fri, 14 Aug 2015 16:01:46 -0400 Received: by wicne3 with SMTP id ne3so29846828wic.1 for ; Fri, 14 Aug 2015 13:01:45 -0700 (PDT) References: <55CDCCE6.90102@kamp.de> From: Alex =?utf-8?Q?Benn=C3=A9e?= In-reply-to: <55CDCCE6.90102@kamp.de> Date: Fri, 14 Aug 2015 21:01:44 +0100 Message-ID: <87zj1thc5z.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] Help debugging a regression in KVM Module List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven Cc: Paolo Bonzini , "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" Peter Lieven writes: > Hi, > > some time a go I stumbled across a regression in the KVM Module that has been introduced somewhere > between 3.17 and 3.19. > > I have a rather old openSUSE guest with an XFS filesystem which realiably crashes after some live migrations. > I originally believed that the issue might be related to my setup with a 3.12 host kernel and kvm-kmod 3.19, > but I now found that it is also still present with a 3.19 host kernel with included 3.19 kvm module. > > My idea was to continue testing on a 3.12 host kernel and then bisect all commits to the kvm related parts. > > Now my question is how to best bisect only kvm related changes (those > that go into kvm-kmod)? In general I don't bother. As it is a bisection you eliminate half the commits at a time you get their fairly quickly anyway. However you can tell bisect which parts of the tree you car about: git bisect start -- arch/arm64/kvm include/linux/kvm* include/uapi/linux/kvm* virt/kvm/ > > Thanks, > Peter -- Alex Bennée