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=-2.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 3E34CC433E7 for ; Sat, 17 Oct 2020 14:29:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E35FB20756 for ; Sat, 17 Oct 2020 14:29:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AvVweg/p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437495AbgJQO32 (ORCPT ); Sat, 17 Oct 2020 10:29:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438310AbgJQO32 (ORCPT ); Sat, 17 Oct 2020 10:29:28 -0400 Received: from mail-ua1-x934.google.com (mail-ua1-x934.google.com [IPv6:2607:f8b0:4864:20::934]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08AECC061755 for ; Sat, 17 Oct 2020 07:29:28 -0700 (PDT) Received: by mail-ua1-x934.google.com with SMTP id q20so1532258uar.7 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=pNzaTwVbw/o1JKGuxxY4fL9vqdk8rPjr9rpsiBjHTvlLzB2KLxOOz+zA74YMw+dxFg 6igF9o9O5aYAf5QcVWYwtTG4m+aCbHkRQeSMtl1T7CpDTwZI7eLSGfhULIfTrzLb/bIq Z4Uui6zm+IStTmsN0csnYeKP115iz6IdertVnlrGlkI3dhjjFeNMHKQsDCj21uNHTqtu qaHJvurC02Vx11GLp046HroW2DKYOCq3Y2o5HbjzEvxj23z8jwVfZhteOugqwJbSALHV lw5+pBevTBgbZaWo1MKW1fgihSYfsEKRhr1v21TFaqiS8Zt/tvyNYAtfHRiWlEFBAb2a E8LQ== X-Gm-Message-State: AOAM531PYn5okMhMo7fip3S84LSkv/LZbhXJlaD4DxmMnMH6r96k1HiJ rcLPHsc9yC4CKO2xHRD6rC4+c5X/9UVvahMdt4Y= 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 Cc: Stefano Garzarella , io-uring@vger.kernel.org, qemu-devel@nongnu.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org 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!