From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34252) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XPaGr-0005r2-3K for qemu-devel@nongnu.org; Thu, 04 Sep 2014 12:52:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XPaGl-0003mA-1x for qemu-devel@nongnu.org; Thu, 04 Sep 2014 12:52:29 -0400 Received: from mail-ob0-x229.google.com ([2607:f8b0:4003:c01::229]:65403) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XPaGk-0003ls-0G for qemu-devel@nongnu.org; Thu, 04 Sep 2014 12:52:22 -0400 Received: by mail-ob0-f169.google.com with SMTP id wp4so7703667obc.0 for ; Thu, 04 Sep 2014 09:52:21 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20140904163800.GA15476@amt.cnet> References: <20140822174531.GA7279@amt.cnet> <20140822190456.GA8963@amt.cnet> <20140822190546.GB8963@amt.cnet> <20140822210146.GA15590@amt.cnet> <53FA144B.20805@redhat.com> <20140904163800.GA15476@amt.cnet> From: Andrey Korolyov Date: Thu, 4 Sep 2014 20:52:00 +0400 Message-ID: Content-Type: text/plain; charset=UTF-8 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: Marcelo Tosatti Cc: Amit Shah , Paolo Bonzini , =?UTF-8?Q?Marcin_Gibu=C5=82a?= , Fam Zheng , "qemu-devel@nongnu.org" 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.