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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC76BC433F5 for ; Tue, 26 Oct 2021 18:35:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98EC360E05 for ; Tue, 26 Oct 2021 18:35:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231782AbhJZSh0 (ORCPT ); Tue, 26 Oct 2021 14:37:26 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:60454 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230225AbhJZSh0 (ORCPT ); Tue, 26 Oct 2021 14:37:26 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 07E5C218B5; Tue, 26 Oct 2021 18:35:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1635273301; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eCzRCi7wq/BDIbf6EPvF1xocGnHS2gUFK27fxzbzX1U=; b=GLFQ0mo9XiKqoRmXWG77EyyPaLQYKTqK3TfhcK0TdoeMUyMEqIAVqADft/YjzmfyoWLVky EtCzqOyKAKfcb1Lea0MJfp8UorcDNMsE1pUhXe26yMURpIoHDp0kk4jnkIF856eZJ/EiNP jsL8ZhrPWgAeGtM8gjB80I8TUeypQA4= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B0D5D13F99; Tue, 26 Oct 2021 18:35:00 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id ohR+KFRKeGG2ewAAMHmgww (envelope-from ); Tue, 26 Oct 2021 18:35:00 +0000 Subject: Re: 5.14.9 aarch64 OOPS Workqueue: btrfs-delalloc btrfs_work_helper To: Chris Murphy Cc: Su Yue , Qu Wenruo , Qu Wenruo , Btrfs BTRFS References: <9e746c1c-85e5-c766-26fa-a4d83f1bfd34@suse.com> <91185758-fdaf-f8da-01eb-a9932734fc09@suse.com> <435c0ba3-dab9-3d01-7d43-0d370ffa36aa@suse.com> From: Nikolay Borisov Message-ID: <0478fe2a-eaef-db2e-2a20-4ea1dd91f67f@suse.com> Date: Tue, 26 Oct 2021 21:35:00 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 26.10.21 г. 21:31, Chris Murphy wrote: > On Tue, Oct 26, 2021 at 2:26 PM Chris Murphy wrote: >> >> On Tue, Oct 26, 2021 at 2:14 PM Nikolay Borisov wrote: >>> >>> >>> >>> On 26.10.21 г. 21:08, Chris Murphy wrote: >>>> I don't know whether the hang and crash are related at all. I've been >>>> unable to get a sysrq+t that shows anything when "dnf install >>>> libreoffice" hangs, which I suspect could be dbus related where a >>>> bunch of services get clobbered and restarted during the metric ton of >>>> dependencies that libreoffice brings into a cloud base image. But >>> >>> >>> Since this is a qemy virtual machine it's possible to acquire a direct >>> memory dump from qemu's management console. There's a dump-guest-memory >>> via qemu's management console alternatively via virsh one can do the >>> procedure described here: >>> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-domain_commands-creating_a_dump_file_of_a_domains_core >>> >>> >>> if you can provide a memory dump + kernel vmlinux then I will be happy >>> to look into this. In the meantime the barriers fixes should remedy crash. >> >> OK thanks. I'll start testing a kernel built with this patch, and then >> move on to capturing a memory dump of the VM if we're still seeing >> hangs. > > With or without the --memory-only option? Yes (though I have never used the virsh method, but straight the hmp one). > >