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=-0.8 required=3.0 tests=FROM_EXCESS_BASE64, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 30954C10F0E for ; Mon, 15 Apr 2019 13:06:46 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EEF2920674 for ; Mon, 15 Apr 2019 13:06:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EEF2920674 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:49969 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hG1Jt-000621-9i for qemu-devel@archiver.kernel.org; Mon, 15 Apr 2019 09:06:45 -0400 Received: from eggs.gnu.org ([209.51.188.92]:38437) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hG1J0-0005gD-8f for qemu-devel@nongnu.org; Mon, 15 Apr 2019 09:05:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hG1Iu-0007eg-Hc for qemu-devel@nongnu.org; Mon, 15 Apr 2019 09:05:50 -0400 Received: from indium.canonical.com ([91.189.90.7]:53762) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hG1Iu-0007be-8f for qemu-devel@nongnu.org; Mon, 15 Apr 2019 09:05:44 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1hG1Is-0007hg-LY for ; Mon, 15 Apr 2019 13:05:42 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 9B8802E8058 for ; Mon, 15 Apr 2019 13:05:42 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 15 Apr 2019 12:59:20 -0000 From: =?utf-8?b?6LSe6LS15p2O?= <1805256@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: qemu-img X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: dannf jnsnow lizhengui X-Launchpad-Bug-Reporter: dann frazier (dannf) X-Launchpad-Bug-Modifier: =?utf-8?b?6LSe6LS15p2OIChsaXpoZW5ndWkp?= References: <154327283728.15443.11625169757714443608.malonedeb@soybean.canonical.com> Message-Id: <155533316061.20414.16005295920588400536.malone@soybean.canonical.com> X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="18920"; Instance="launchpad-lazr.conf" X-Launchpad-Hash: da3867dcabae42ec3745b84b56e74d8309333db2 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 91.189.90.7 Subject: [Qemu-devel] [Bug 1805256] Re: qemu-img hangs on high core count ARM system X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1805256 <1805256@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Message-ID: <20190415125920.lVsYxDWZYelXBGa-Lk2WujeBBS-CB7epoEfupiiB2fk@z> Hi, I also found a problem that qemu-img convert hands in ARM. The convert command line is "qemu-img convert -f qcow2 -O raw disk.qcow2 disk.raw ". The bt is below: Thread 2 (Thread 0x40000b776e50 (LWP 27215)): #0 0x000040000a3f2994 in sigtimedwait () from /lib64/libc.so.6 #1 0x000040000a39c60c in sigwait () from /lib64/libpthread.so.0 #2 0x0000aaaaaae82610 in sigwait_compat (opaque=3D0xaaaac5163b00) at util/c= ompatfd.c:37 #3 0x0000aaaaaae85038 in qemu_thread_start (args=3Dargs@entry=3D0xaaaac5163= b90) at util/qemu_thread_posix.c:496 #4 0x000040000a3918bc in start_thread () from /lib64/libpthread.so.0 #5 0x000040000a492b2c in thread_start () from /lib64/libc.so.6 Thread 1 (Thread 0x40000b573370 (LWP 27214)): #0 0x000040000a489020 in ppoll () from /lib64/libc.so.6 #1 0x0000aaaaaadaefc0 in ppoll (__ss=3D0x0, __timeout=3D0x0, __nfds=3D, __fds=3D) at /usr/include/bits/poll2.h:77 #2 qemu_poll_ns (fds=3D, nfds=3D, timeout=3D<= optimized out>) at qemu_timer.c:391 #3 0x0000aaaaaadae014 in os_host_main_loop_wait (timeout=3D)= at main_loop.c:272 #4 0x0000aaaaaadae190 in main_loop_wait (nonblocking=3D) at = main_loop.c:534 #5 0x0000aaaaaad97be0 in convert_do_copy (s=3D0xffffdc32eb48) at qemu-img.c= :1923 #6 0x0000aaaaaada2d70 in img_convert (argc=3D, argv=3D) at qemu-img.c:2414 #7 0x0000aaaaaad99ac4 in main (argc=3D7, argv=3D) at qemu-im= g.c:5305 Do you find the cause of the problem and fix it? Thanks for your reply! -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on high core count ARM system Status in QEMU: New Bug description: On the HiSilicon D06 system - a 96 core NUMA arm64 box - qemu-img frequently hangs (~50% of the time) with this command: qemu-img convert -f qcow2 -O qcow2 /tmp/cloudimg /tmp/cloudimg2 Where "cloudimg" is a standard qcow2 Ubuntu cloud image. This qcow2->qcow2 conversion happens to be something uvtool does every time it fetches images. Once hung, attaching gdb gives the following backtrace: (gdb) bt #0 0x0000ffffae4f8154 in __GI_ppoll (fds=3D0xaaaae8a67dc0, nfds=3D187650= 274213760, = timeout=3D, timeout@entry=3D0x0, sigmask=3D0xffffc123b= 950) at ../sysdeps/unix/sysv/linux/ppoll.c:39 #1 0x0000aaaabbefaf00 in ppoll (__ss=3D0x0, __timeout=3D0x0, __nfds=3D, = __fds=3D) at /usr/include/aarch64-linux-gnu/bits/poll2= .h:77 #2 qemu_poll_ns (fds=3D, nfds=3D, = timeout=3Dtimeout@entry=3D-1) at util/qemu-timer.c:322 #3 0x0000aaaabbefbf80 in os_host_main_loop_wait (timeout=3D-1) at util/main-loop.c:233 #4 main_loop_wait (nonblocking=3D) at util/main-loop.c:497 #5 0x0000aaaabbe2aa30 in convert_do_copy (s=3D0xffffc123bb58) at qemu-im= g.c:1980 #6 img_convert (argc=3D, argv=3D) at qemu-= img.c:2456 #7 0x0000aaaabbe2333c in main (argc=3D7, argv=3D) at qemu= -img.c:4975 Reproduced w/ latest QEMU git (@ 53744e0a182) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1805256/+subscriptions