From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37071) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XPcAq-0000Cq-8X for qemu-devel@nongnu.org; Thu, 04 Sep 2014 14:54:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XPcAl-0006E8-Li for qemu-devel@nongnu.org; Thu, 04 Sep 2014 14:54:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44625) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XPcAl-0006E1-Dr for qemu-devel@nongnu.org; Thu, 04 Sep 2014 14:54:19 -0400 Date: Thu, 4 Sep 2014 15:54:01 -0300 From: Marcelo Tosatti Message-ID: <20140904185401.GA19586@amt.cnet> References: <20140822190456.GA8963@amt.cnet> <20140822190546.GB8963@amt.cnet> <20140822210146.GA15590@amt.cnet> <53FA144B.20805@redhat.com> <20140904163800.GA15476@amt.cnet> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Andrey Korolyov Cc: Amit Shah , Paolo Bonzini , Marcin =?utf-8?Q?Gibu=C5=82a?= , Fam Zheng , "qemu-devel@nongnu.org" On Thu, Sep 04, 2014 at 08:52:00PM +0400, Andrey Korolyov wrote: > On Thu, Sep 4, 2014 at 8:38 PM, Marcelo Tosatti wrote: > > On Sun, Aug 24, 2014 at 10:51:38PM +0400, Andrey Korolyov wrote: > >> On Sun, Aug 24, 2014 at 8:57 PM, Andrey Korolyov wrote: > >> > On Sun, Aug 24, 2014 at 8:35 PM, Paolo Bonzini wrote: > >> >> Il 24/08/2014 18:19, Andrey Korolyov ha scritto: > >> >>> Sorry, I was a bit inaccurate in my thoughts at Fri about necessary > >> >>> amount of work, patch lays perfectly on 3.10 with bit of monkey > >> >>> rewrites. The attached one fixed problem for me - it represents > >> >>> 0b10a1c87a2b0fb459baaefba9cb163dbb8d3344, > >> >>> 0bc830b05c667218d703f2026ec866c49df974fc, > >> >>> 44847dea79751e95665a439f8c63a65e51da8e1f and > >> >>> 673f7b4257a1fe7b181e1a1182ecc2b6b2b795f1. > >> >> > >> >> So, with these changes, Marcelo's patch does not hang up your guest anymore? > >> >> > >> >> Paolo > >> >> > >> > > >> > If I may reword, Marcelo`s proposed states sync with revert-revert of > >> > agraf`s patch, does not break anything for Windows (migration works > >> > well for any variant of emulator with modified kernel modules). Let me > >> > check if initially reported issue (lost I/O interrupts) is gone for > >> > the current situation (patched kernel plus Marcelo` patch). > >> > >> > >> patched kernel + any 2.1 variant + Windows = works > >> patched kernel + patched 2.1 + Linux + disk workload = works fine > > > > Andrey, > > > > What patch is this again ? > > > > > > It is attached to the message which has a highest quoting order above > 1), basically it is a monkey adaptation of newer ioapic patches for > 3.10. RH kernel includes them, so Centos7/RH7 users should not observe > reported problem. > > [1] https://www.mail-archive.com/qemu-devel@nongnu.org/msg252526.html > > Using the opportunity - what are plans, if there are any, to revive > agraf`s patch which was the reason of an initial issue in this thread? > The Windows issue is most probably unrelated to it and I`d be happy to > check patch proposals because there are a lot of suffering with VMs > with large uptime and live migration when negative time shift appears. I'll try to confirm via Marcin's testcase (vfio+VM migration on Linux guests), that the proposed patch is fixing the issue. Getting a BSOD on Win2008-R2-x64 while trying to install virtio-win driver (viostor related BSOD).