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=-2.3 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM,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 7A569C433E7 for ; Sat, 17 Oct 2020 14:39:03 +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 0E10A20708 for ; Sat, 17 Oct 2020 14:39:03 +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="AvVweg/p" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0E10A20708 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]:51664 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kTnMM-0006Ci-7f for qemu-devel@archiver.kernel.org; Sat, 17 Oct 2020 10:39:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41416) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kTnD7-0003eb-Tn for qemu-devel@nongnu.org; Sat, 17 Oct 2020 10:29:30 -0400 Received: from mail-ua1-x92a.google.com ([2607:f8b0:4864:20::92a]:46422) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kTnD6-0006mZ-AN for qemu-devel@nongnu.org; Sat, 17 Oct 2020 10:29:29 -0400 Received: by mail-ua1-x92a.google.com with SMTP id y1so1520352uac.13 for ; Sat, 17 Oct 2020 07:29:27 -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=P+gIv2Lcj4WNQ6W5r97xFTj/z+w+Zw6Am1AGbMCfPgE=; b=AvVweg/pSu+cvJE0S0zZqtqcLAoadXExFz3xAe9zG7vo50YMTLwHQ1i8ftED2DTCXA uDyLEeGC6cYYaKOaXhAhMiSavtK6o+K0Bf0j3CS6CK6OzuSRfmaff3DhIkmIeSRj1QmC iOisXBQpzXX94cVxrWjw059s2E/Sj+SZ8+0L6jcZKRmU2wzQSoBODay/ZjP4eDDE4KHD rIXoGB1a4ZvI8eIsepfck2FIUOVafAAvByyjbLIaaBkDw2ok0thiS0I16UshtZz++jVD JAra2+ekaIrQbnMF4Bc81YjliIwbhBI8tg+Dy3t7U9FlTbPsxakUCdFDzj6/YRsRUX3Z TwAw== 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=P+gIv2Lcj4WNQ6W5r97xFTj/z+w+Zw6Am1AGbMCfPgE=; b=c2oUKxXsdGRKhwfBg1+OSZqkFypQBGcIgKpG0KmAYlWTdJYdnFSOf0it7vM7QuuYBR n2jdQ4/QuCWb1UacfbOoGYrWsho4GwKuy5S0l3adfFEhtmoV9j6rAQ3Mz2J6WSynN1K/ tJLNbeJ87ukrkbmFymoiOlEb7kvuqU+Pl0/wTjWYGLYWMzoZXQk3lnw71sfT3mvACy8D BiXqdsYxZQ6Vz6T0DgGZ4BkE7WZ8fGZSiIef2dHArasiNJ2t8Wemf/Sn8C+4JXFhffJZ ZaTmKbhOyJxCsAi1p1ZUTyVBJlWKPv4jrh4DbAHtPAbxXQBP4hq2JqM4PL4VBN8uBp0D xUSA== X-Gm-Message-State: AOAM531kJPXougBkYGL6l26KD0IM/rpm7k4n6yZ4F2XNT3+CocCAJP/J nzRq4S7d9chdEyQVMW7LZ/MDjhbW9RQUSFez2/U= X-Google-Smtp-Source: ABdhPJzden7sO+y2LzeOJWCADNP5kK3JioLv+GRKwCvaAYdK5okKzL5TOLlsjB6Kg7jXp74ndZ1SqzW+p2DQEwMjyA0= X-Received: by 2002:ab0:6f81:: with SMTP id f1mr4272724uav.31.1602944967083; Sat, 17 Oct 2020 07:29:27 -0700 (PDT) MIME-Version: 1.0 References: <20201001085900.ms5ix2zyoid7v3ra@steredhat> <20201002073457.jzkmefo5c65zlka7@steredhat> <05afcc49-5076-1368-3cc7-99abcf44847a@kernel.dk> In-Reply-To: <05afcc49-5076-1368-3cc7-99abcf44847a@kernel.dk> From: Ju Hyung Park Date: Sat, 17 Oct 2020 23:29:16 +0900 Message-ID: Subject: Re: io_uring possibly the culprit for qemu hang (linux-5.4.y) To: Jens Axboe Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2607:f8b0:4864:20::92a; envelope-from=qkrwngud825@gmail.com; helo=mail-ua1-x92a.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: -7 X-Spam_score: -0.8 X-Spam_bar: / X-Spam_report: (-0.8 / 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_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: qemu-devel@nongnu.org, io-uring@vger.kernel.org, Stefano Garzarella Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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!