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=-5.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 78694C433DF for ; Fri, 16 Oct 2020 18:07:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1645208E4 for ; Fri, 16 Oct 2020 18:07:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="XY5Y7p5Q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390831AbgJPSHX (ORCPT ); Fri, 16 Oct 2020 14:07:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390732AbgJPSHX (ORCPT ); Fri, 16 Oct 2020 14:07:23 -0400 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E652C061755 for ; Fri, 16 Oct 2020 11:07:23 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id e10so1953457pfj.1 for ; Fri, 16 Oct 2020 11:07:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=GJ0kW23Ft7kWH2L+opK74RczYd3mTtbU1W4ReHf2wes=; b=XY5Y7p5QtxRuSw0s8op8laLGN1x/0bHaeejX4lFztMjppPwiehLWiY2y+X17MyA/YX W4aagBo/SZFPaVx7CjuCWTqzaFGJ8ekZiPC7AfEVSeKT301Mk2c8zm5eRkrcLZmOL1cD 33s7QxQzaTbSyB/ak/9eSkQQJHF0e4XB+F9p6/UmioVNNjbv923RXtXWlnwL7bnSWgPE MrQUP4DedDsJpztWyEWi7bd7TENuLPy/wyx+rg0OMxjlez6RhBd79ccI/+NpgqoIYJfj 8NRjIkim8/UahBCMNW7UaPMuvIgGK87ykuVo/czcznvz5K5RAho2kTvqO2Q2IFskPne2 1+zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=GJ0kW23Ft7kWH2L+opK74RczYd3mTtbU1W4ReHf2wes=; b=gw3Nz/yn0cEvJ8RC1bOY2Vkifx4EPELjJwV+DLTfSUW++jcz+8YoMkH11bQ6gub3L3 aMNkVfQEbeaXc8WMU5d9xu4LAsKvCTQQOUBqXfmN1lfvBWrYWbH9fW3f40uVUfcObteg GvYEDkjh2l7fPr6wJZkncY18QpV2RoCFCmrowRWEyCoN0NqVHtFOyzDHcBoAfQLaFrc+ u58s/sp/U5Zz8XeOuyy25BBEphcPGt1neHqzEGQD+rU3ae+BcWOgC5nN57oPrHiDE7Js EKv6Q8HToqGssnX3yqm+1KT6712EECFAf2ANXMpbdDUY9f2VFbv5QpIrOjDDYzGTFOEg a7Dg== X-Gm-Message-State: AOAM532WaxQ5hpZXU1L684l/GxiVXUr/Rnr//znhMIC+0OJ69pcOYcKT cuXXCkned+zZOahlZ7e4SUEk0uj7eI6OYfDf X-Google-Smtp-Source: ABdhPJyttTkUxmZoD0Pgnp7k3WrSY+ASrIX7oi3nhBE1KZq63c5P53fwgPS446EK0NGdb83pMsrmdA== X-Received: by 2002:a63:5b60:: with SMTP id l32mr4300008pgm.134.1602871642764; Fri, 16 Oct 2020 11:07:22 -0700 (PDT) Received: from [192.168.1.134] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id c21sm3609040pfo.139.2020.10.16.11.07.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 16 Oct 2020 11:07:22 -0700 (PDT) Subject: Re: io_uring possibly the culprit for qemu hang (linux-5.4.y) To: Ju Hyung Park , Stefano Garzarella Cc: io-uring@vger.kernel.org, qemu-devel@nongnu.org References: <20201001085900.ms5ix2zyoid7v3ra@steredhat> <20201002073457.jzkmefo5c65zlka7@steredhat> From: Jens Axboe Message-ID: <05afcc49-5076-1368-3cc7-99abcf44847a@kernel.dk> Date: Fri, 16 Oct 2020 12:07:21 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 10/16/20 12:04 PM, Ju Hyung Park wrote: > A small update: > > As per Stefano's suggestion, disabling io_uring support from QEMU from > the configuration step did fix the problem and I'm no longer having > hangs. > > Looks like it __is__ an io_uring issue :( Would be great if you could try 5.4.71 and see if that helps for your issue. -- Jens Axboe