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,URIBL_BLOCKED,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 AE01AC433E7 for ; Sat, 17 Oct 2020 15:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E67B2073A for ; Sat, 17 Oct 2020 15:02:12 +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="l3DQGcmC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438461AbgJQPCM (ORCPT ); Sat, 17 Oct 2020 11:02:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438449AbgJQPCL (ORCPT ); Sat, 17 Oct 2020 11:02:11 -0400 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A86DC061755 for ; Sat, 17 Oct 2020 08:02:11 -0700 (PDT) Received: by mail-pg1-x52f.google.com with SMTP id g29so3236511pgl.2 for ; Sat, 17 Oct 2020 08:02:11 -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=3Av728nHUNWDB99Z9R2oPXgfeSaWAqr1kGKqCSrROkg=; b=l3DQGcmChwuutZXYo7hRJRTj652AaI25WSApAF4SR9zbf6NzjCsieQPaXMG3STe/ZL yhFv6RGW+omQOGF+/cXP6FAK/ZTu6097t6tcaAeGBCmo9MW3FLArj7kILhrq1LJtAQ4D UzCHwyN6mqig60fNBaygRFX9M9pQToLNuNAvwMiDAvfGQO6r8N0ToNGY80VUNzFeVrgJ rFKuU3GeYaccI+q99RGb1cmXmHhsIG7c3uj8wRodTA4hGX9fuUosx+cBCB4yo7kMZZ+C YSf2RONP6BAZoYnCvuhCRhpOn88jD1AQDYGsxPPFdwBmM5Tm1LgCwvmQ+FavlbLBHZM8 YcsQ== 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=3Av728nHUNWDB99Z9R2oPXgfeSaWAqr1kGKqCSrROkg=; b=s7XO58q3MfDtdG3oa2O7s6FvTdgMccPOfSxv+yTemrWJFdoACK2N9WxZ027T6svQIj WHl7XDwAtlPsMlr0EFDP8YJlBywEUdTaXxQ5YgTyiYMMh/59wLUyNE6/I20vjtWINwJu BHz1XNw/v8jfohwu8zjSw/SIEvEsENTk9JymdPvuqNN/rH/VKjz2H/5eK6tHTrOnr1Ge YMqdR9XKZ1TQl/mYHXXI3pw+EEzydiBt5g45wDBr2gyfiSAfJEo22YTQf3sCtCpzKyzg tNrS2/bwLt4gYx1KZhnlEfVjpwWDF0JmoiWB8ZgwhDLAErUKuZXz+n4/DfSLGXM2fHyS XYZQ== X-Gm-Message-State: AOAM530WbqR6r3Hl4xg8aCdNzOabscPDSpSGLVL4OzUZJDUry5CKPpLp RNKeXFIsvYWjsLj2aRTtK5uOwiHBUrbgxZ3H X-Google-Smtp-Source: ABdhPJyB6FbdNCnvkLijCDVBbwjGC+a0NwA6qlBeytGY5+f2CyXS0uMfYrWKL12OwEg86LRKbnJLyA== X-Received: by 2002:a63:380d:: with SMTP id f13mr7612106pga.105.1602946930766; Sat, 17 Oct 2020 08:02:10 -0700 (PDT) Received: from [192.168.1.134] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id y80sm6298017pfb.144.2020.10.17.08.02.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 17 Oct 2020 08:02:10 -0700 (PDT) Subject: Re: io_uring possibly the culprit for qemu hang (linux-5.4.y) To: Ju Hyung Park Cc: Stefano Garzarella , io-uring@vger.kernel.org, qemu-devel@nongnu.org References: <20201001085900.ms5ix2zyoid7v3ra@steredhat> <20201002073457.jzkmefo5c65zlka7@steredhat> <05afcc49-5076-1368-3cc7-99abcf44847a@kernel.dk> From: Jens Axboe Message-ID: <7ea53adb-14c7-8c31-2f9e-44a3847ee91c@kernel.dk> Date: Sat, 17 Oct 2020 09:02:09 -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 10/17/20 8:29 AM, Ju Hyung Park wrote: > 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. Awesome, thanks for testing! -- Jens Axboe