From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42520C433E3 for ; Tue, 28 Jul 2020 10:30:37 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1125E20775 for ; Tue, 28 Jul 2020 10:30:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KFPanDEr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1125E20775 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55470 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k0MsW-0007zo-96 for qemu-devel@archiver.kernel.org; Tue, 28 Jul 2020 06:30:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51236) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k0MrL-00079Z-3s; Tue, 28 Jul 2020 06:29:23 -0400 Received: from mail-wm1-x341.google.com ([2a00:1450:4864:20::341]:54895) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k0MrJ-0001Vy-57; Tue, 28 Jul 2020 06:29:22 -0400 Received: by mail-wm1-x341.google.com with SMTP id d190so180538wmd.4; Tue, 28 Jul 2020 03:29:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=KKKAwKcpEtwJZucV5CE59QSNf2jOkDHuJEoi0iqMrww=; b=KFPanDErnrbCYcxSi4FJg28zqjtNZihKYqux9Z5MdbYaMBl9djx60FNIvYDClSwFQU AOf4QEbcicT6biFXkvBLFKtzKjVnnGGN/o4xfAdfaWuYGV66h30wriXflKbRBHNvUagq FjucPLKLccO0cLVWGxO2hrRmz/mtR4LBEXrWmeaUeydH9kDXqO5f7k62P+CEiagbxC1G o5NIXN+WrBY/77fwnEtSH+UX86g2G8b66g6J3twCYI/98o6bqOBJcWvyr8GdngnP2d7W UtLcWkmFwn7BFBYQrSC8+UPWLqNHQ2IkfM1rt1X3aPX/IwC7td6jhgQvqYN/SP0+wQ2W Yw4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=KKKAwKcpEtwJZucV5CE59QSNf2jOkDHuJEoi0iqMrww=; b=j75knPpP/d2n3TM+cZAARz560peykFUHSmeJ/cVOyUeX9sT5S/LndLFkg/938J+crY SFXQGiU+7km4kNeratjDV5HKjuEoMlGgBR5B2WcQYIMP00ihTlC5TbFXAm+H8U1/+xzM lHfeSbZKNo/WjtFScFnxWCbGtrJxGzF/y7MaZRMV85eJxO47o+V6B0N6F65IcfpzRtCe 1FVytuvynl5RZ8PRv/1DoWhYB06t/ES+gMvDOfDGdGka8eLaoNe13HKIKuMvgTx8xFcr Eiz+TOL2qtpHynyv2ZXsEJ9Qpas0EtfnxQCUgSCunpd3xXXXBBFX6t/Dmm76cBqBaY/U VzEw== X-Gm-Message-State: AOAM530jDkBtP+ZL08i0DTrUCNLSBN46i1DYM/k+9lNiwiXeHXXf+mtf ugRfihSEcolGs9FQgWITNx0= X-Google-Smtp-Source: ABdhPJz2LOmZxuCv+ePe86dUm8OEHQijTbLe9Oh16t/aAcls9zEXmYtRY+EUUMinWJpgmFtEe1qF6A== X-Received: by 2002:a1c:7f91:: with SMTP id a139mr3241884wmd.153.1595932158825; Tue, 28 Jul 2020 03:29:18 -0700 (PDT) Received: from localhost ([51.15.41.238]) by smtp.gmail.com with ESMTPSA id s205sm3980170wme.7.2020.07.28.03.29.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jul 2020 03:29:17 -0700 (PDT) Date: Tue, 28 Jul 2020 11:29:16 +0100 From: Stefan Hajnoczi To: Lukas Straub Subject: Re: [PATCH v5 0/7] Introduce 'yank' oob qmp command to recover from hanging qemu Message-ID: <20200728102916.GC10336@stefanha-x1.localdomain> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="6zdv2QT/q3FMhpsV" Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=2a00:1450:4864:20::341; envelope-from=stefanha@gmail.com; helo=mail-wm1-x341.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Daniel =?iso-8859-1?Q?P=2E_Berrang=E9?= , qemu-block , Juan Quintela , "Dr. David Alan Gilbert" , qemu-devel , =?iso-8859-1?Q?Marc-Andr=E9?= Lureau , Paolo Bonzini , Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --6zdv2QT/q3FMhpsV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jun 23, 2020 at 04:42:30PM +0200, Lukas Straub wrote: > In many cases, if qemu has a network connection (qmp, migration, chardev, etc.) > to some other server and that server dies or hangs, qemu hangs too. > These patches introduce the new 'yank' out-of-band qmp command to recover from > these kinds of hangs. The different subsystems register callbacks which get > executed with the yank command. For example the callback can shutdown() a > socket. This is intended for the colo use-case, but it can be used for other > things too of course. Acked-by: Stefan Hajnoczi --6zdv2QT/q3FMhpsV Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAl8f/fwACgkQnKSrs4Gr c8gnCAf+L5/9FX/d7xocqKUKB6yTx9xuDZ01uU/l1N8JL7HhJfas6O/HGCNNnN+C M1q1V8sb0zJbXHHX7BkQcDsTOzfNSCAAltl/2kUAvPiL2IDAtgC8v/bn6f9rsHtO lQ+0aswR/6Mcc+gAgSdrlUMDsq4APZu7TAkKvSi0INVn2bACELxeMwoB0+ZsXLFn DqiTQXSdD8nxBpYrvvgnE46T//xUDjRwcbWrB0FHh0ljJ/EiPJlSRSsN7QC4/3mE zM4vZNuyQS/SqFNrl4TGgAzUVdOiJiPna/OsPSR6qfjrAKh+O/hupAsc4BSIg4hO Rg90R1Z2bYt5B9Oc4xfdw/LvxVJqsQ== =shZx -----END PGP SIGNATURE----- --6zdv2QT/q3FMhpsV--