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=-3.3 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, URIBL_BLOCKED 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 0105CC433DF for ; Mon, 19 Oct 2020 09:24:00 +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 5CF2722200 for ; Mon, 19 Oct 2020 09:23:59 +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="mlv/9Sgc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5CF2722200 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]:45154 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kUROY-00037N-9o for qemu-devel@archiver.kernel.org; Mon, 19 Oct 2020 05:23:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46322) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kURNn-0002g9-35 for qemu-devel@nongnu.org; Mon, 19 Oct 2020 05:23:11 -0400 Received: from mail-il1-x142.google.com ([2607:f8b0:4864:20::142]:37674) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kURNl-0007lQ-Bj for qemu-devel@nongnu.org; Mon, 19 Oct 2020 05:23:10 -0400 Received: by mail-il1-x142.google.com with SMTP id j13so9740815ilc.4 for ; Mon, 19 Oct 2020 02:23:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=M7zMqBIzaYC8t0KoPaFRCpogFr9O8bSVaG7aPpieQD4=; b=mlv/9SgcqSzEsTUZx9aRiX8kkAQ5dvoCcGrbk6YP/JHefD8mEwqyBM1VYGzHZ9CQbt jtidmdeeBcV4VbN4G2xxlCnrDicwAvX8SJmS7PwSS3wuzRvKZiKLGuQicQGejlxlSnuB u5KPuO5rQuZIcabFcytDQRlyE0mj667ifS/5RYIIMUkhGPMiq1hqB5ORtJHWV44gCvRH 7X4dxW4mVf2gvtXb+A+JRZOdE/1Hb+vtzNgt2b0NFlWoWum3DMR7BUzB/DTF0Fsm3pcl i2WspKoi2wZyTZnUgzIHYAgSBfqZid55HaFPxHD5dRFaaAymjo2//WtkCE3QacYbPQ8i LCMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=M7zMqBIzaYC8t0KoPaFRCpogFr9O8bSVaG7aPpieQD4=; b=t7rFFLpiIW5kIZXWca2aR/qqqc775uMRW0+uQdJpKPT8GegCdSQQd+F+qcy3edl/vi 4fwG2H4p2lFTAajRSwjWQcF1hFD0OIUzkkMogEo/D93zNSOR+TOv8AXKwiqUhYtPmTJ0 v0BLgpCnHdOMrG++FTo4C8+Rrg1OZ5r9KkoOQQx0D4gqL3SOEiseahbN2nOFHEwr4Qbb Eo+5qo8LgvBQFJrLAhdhzfmXzd7OM3npmH+vXp5u8FT80xvjnpmCCCOcteatwO68YhZ9 zU2Jldnc/DDQ+moh1uIBc9HOLwCAuiCErhol5H0ooSk3XJ2QutqcqGAcBg6NDRDTalGU rM+g== X-Gm-Message-State: AOAM5331IG7Uu72HWHSJEdvs7w8XXyXs9wiEJOOIzQpeey8rZRwGvt23 zdZ5+LYSIfsT2RXM/7O5RXZREx+zY7K9xYwuixY= X-Google-Smtp-Source: ABdhPJxGIkaEEmNkCDdDA+n1nnJLFEJi1EMI8Ug7uTfGxLgBJQBjMXMdt2JxEkCXXD/BwUsOZKovV+VDQHJ3I90X2e8= X-Received: by 2002:a92:c04c:: with SMTP id o12mr2851792ilf.22.1603099387435; Mon, 19 Oct 2020 02:23:07 -0700 (PDT) MIME-Version: 1.0 References: <20201001085900.ms5ix2zyoid7v3ra@steredhat> <20201002073457.jzkmefo5c65zlka7@steredhat> <05afcc49-5076-1368-3cc7-99abcf44847a@kernel.dk> In-Reply-To: From: Pankaj Gupta Date: Mon, 19 Oct 2020 11:22:56 +0200 Message-ID: Subject: Re: io_uring possibly the culprit for qemu hang (linux-5.4.y) To: Jack Wang Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2607:f8b0:4864:20::142; envelope-from=pankaj.gupta.linux@gmail.com; helo=mail-il1-x142.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: Jens Axboe , Ju Hyung Park , Stefano Garzarella , Qemu Developers , io-uring@vger.kernel.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" @Jack Wang, Maybe four io_uring patches in 5.4.71 fixes the issue for you as well? Thanks, Pankaj > Hi Jens. > > On Sat, Oct 17, 2020 at 3:07 AM Jens Axboe wrote: > > > > Would be great if you could try 5.4.71 and see if that helps for your > > issue. > > > > Oh wow, yeah it did fix the issue. > > I'm able to reliably turn off and start the VM multiple times in a row. > Double checked by confirming QEMU is dynamically linked to liburing.so.1. > > Looks like those 4 io_uring fixes helped. > > Thanks! >