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 4D22DC433EF for ; Thu, 21 Oct 2021 14:43:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 347A161038 for ; Thu, 21 Oct 2021 14:43:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231220AbhJUOpi (ORCPT ); Thu, 21 Oct 2021 10:45:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230283AbhJUOph (ORCPT ); Thu, 21 Oct 2021 10:45:37 -0400 Received: from mail-yb1-xb2f.google.com (mail-yb1-xb2f.google.com [IPv6:2607:f8b0:4864:20::b2f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91095C0613B9 for ; Thu, 21 Oct 2021 07:43:21 -0700 (PDT) Received: by mail-yb1-xb2f.google.com with SMTP id i9so717093ybi.8 for ; Thu, 21 Oct 2021 07:43:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=colorremedies-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=wFWrVIJDZD8vZFQTWAClmJbfkrkgyN/qsMxYu8dWu4g=; b=jl8qnuLOVY10Do7q1dI4m6b5rOQN34xyhiHJHjJy3qwZxKu/4gMA+s/yHnOSGUkCdY gAurSrPnkaZ99jaSa1xQmnaSLmWu8qPffpIHbYzx8mq3fCpKGUZL3/o0kwceYmEZ+lDC pa2eTKoyO+0eb5BJrbCEJImLl8PPP7fJEWwt3/nQBw9Z+jg1+LmcwtAb0Z14rLXRIJa7 EpnBTxnKxiWfMULwkPI320rO6OJGkA8NyUqJY74MF8svp5ncEarS5od7uylh8UDygSC6 dX37ekYyGtrO3hRkkpk8aytyfX/keLz+bNMKDuM82L1QBP+N7RMtbEMpfRv5BIokzK7X 0LEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=wFWrVIJDZD8vZFQTWAClmJbfkrkgyN/qsMxYu8dWu4g=; b=xEH0TmMMl2+K3fVKhEVDg0r48v4WuJZZARf3fhtU/j1Hkma+qrSNDdHRYaaTUsxoot qsyJQ11BdXpFjsneKwzn7eHHBT1kwwYV5MHdQQEZ3dw3s9kT2aEDPuO4B+NJnaRd6GLh aCxi+QubyU02XjjPUkukTkLLLA9HM7nWZiTw1KJbqinXeStcd/2V9BfnHYATr1L1bSG5 IlP8rQia0TPc+uow2HdGDDiFKE4i8BAbtNKEfi3RlXpfMUy0O++p/0UErLvzttHpUvgt /4VkwSoCCdOHy2ZCLrbbzRfsy1k0wojoGHZ1S+QmxZYPIMILOFO916bANXZf91LFCaD7 myUg== X-Gm-Message-State: AOAM531MaOFAAH9QSqMtfxDDw3FKlZ49nMnnOIRGtmJgNbPp4P+Hz3K5 3xdl3I4lsvGVgdppliuKLx+AZ8d75QxvTHjyta3mGg== X-Google-Smtp-Source: ABdhPJyCrOxmtKtyVV/g65CcVHlrNB1QEAsH84o5K64sQx01yVsfZJ99dtqaWWyV8hK4wvFpe9DzdpKixOF0neeTaP0= X-Received: by 2002:a25:4d83:: with SMTP id a125mr6584084ybb.277.1634827400793; Thu, 21 Oct 2021 07:43:20 -0700 (PDT) MIME-Version: 1.0 References: <9b153cca-2d9a-e217-a83f-1a8e663fc587@suse.com> <7de9iylb.fsf@damenly.su> <35owijrm.fsf@damenly.su> In-Reply-To: From: Chris Murphy Date: Thu, 21 Oct 2021 10:43:04 -0400 Message-ID: Subject: Re: 5.14.9 aarch64 OOPS Workqueue: btrfs-delalloc btrfs_work_helper To: Su Yue Cc: Chris Murphy , Qu Wenruo , Nikolay Borisov , Qu Wenruo , Btrfs BTRFS Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Wed, Oct 20, 2021 at 8:34 PM Su Yue wrote: > > > On Wed 20 Oct 2021 at 19:55, Chris Murphy > wrote: > > > On Tue, Oct 19, 2021 at 9:10 PM Su Yue wrote: > >> > >> Dump file and vmlinu[zx] kernel file are needed. > > > > So we get a splat but kdump doesn't create a vmcore. Do we need > > to > > issue sysrq+c at the time of the hang and splat to create it? > > > Yes, please. > > BTW, I ran xfstests with 5.14.10-300.fc35.aarch64 and > 5.14.12-200.fc34.aarch64 in several rounds. No panic/hang found, > so I think we can exclude the possibility of the toolchain. It's really weird. I was given a vexxhost aarch64 VM to play in and try to get a vmcore for you guys, but nothing I did triggered the splat. Then a colleague tried it, same hosting company, and was able to reproduce it almost immediately. Same distro and kernel. So I don't know what that means, if it's possible this the provisioning of the VM could end up on different hardware, and it is some aspect of the hardware that's resulting in this issue. But anyway, he will be able to get a kernel core dump soon, and maybe that'll tell us what's going on. -- Chris Murphy