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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A20A5C433EF for ; Mon, 14 Mar 2022 17:27:05 +0000 (UTC) Received: from localhost ([::1]:42818 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nToTI-0001Qq-NC for qemu-devel@archiver.kernel.org; Mon, 14 Mar 2022 13:27:04 -0400 Received: from eggs.gnu.org ([209.51.188.92]:36710) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nToQm-0006LS-Ou for qemu-devel@nongnu.org; Mon, 14 Mar 2022 13:24:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:39984) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nToQk-00060G-2Y for qemu-devel@nongnu.org; Mon, 14 Mar 2022 13:24:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647278665; h=from:from:reply-to:reply-to:subject:subject: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=XmUEggvj5V5jiP6KlzAsy1LdrU7Qs0vdR+0O81Gs1Ew=; b=OgzSjiJ7EoOiFPGqBAEjvyOLifrpoOdR4IZ8Xyg1Nfwd0FgzzvAz2ppOP69sQ22rTPQbAz 7sbc1EgZhoirwxZzej/ZDmHsySRwX3n0l5b/CTk6I41vwh/p4skUQLbFM/aXYflFMHZra0 nfzHexhT02EJZyydWlvMPAwwxSL1cDE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-93-qKDUKpFsONukKrZrMFo7sw-1; Mon, 14 Mar 2022 13:24:23 -0400 X-MC-Unique: qKDUKpFsONukKrZrMFo7sw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 56D0B80281D; Mon, 14 Mar 2022 17:24:23 +0000 (UTC) Received: from redhat.com (unknown [10.33.36.154]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BFDF02D47D; Mon, 14 Mar 2022 17:24:17 +0000 (UTC) Date: Mon, 14 Mar 2022 17:24:15 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Peter Maydell Subject: Re: [PULL 00/18] migration queue Message-ID: References: <20220302182936.227719-1-dgilbert@redhat.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/2.1.5 (2021-12-30) X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: thuth@redhat.com, quintela@redhat.com, s.reiter@proxmox.com, qemu-devel@nongnu.org, peterx@redhat.com, "Dr. David Alan Gilbert" , "open list:S390 general arch..." , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , hreitz@redhat.com, f.ebner@proxmox.com, jinpu.wang@ionos.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, Mar 14, 2022 at 05:15:57PM +0000, Peter Maydell wrote: > On Mon, 14 Mar 2022 at 17:07, Daniel P. Berrangé wrote: > > So the test harness is waiting for a reply to 'query-migrate'. > > > > This should be fast unless QEMU has hung in the main event > > loop servicing monitor commands, or stopped. > > I was kind of loose with the terminology -- I don't remember whether > it was actually hung in the sense of stopped entirely, or just > "sat in a loop waiting for a migration state that never arrives". > I'll try to look more closely if I can catch it in the act again. Ah yes, if it is just forever migrating, that would match the stack traces shown from the QEMUs. > One thing that makes this bug investigation trickier, incidentally, > is that the migration-test code seems to depend on userfaultfd. > That means you can't run it under 'rr'. Yeah, we also can't turn on the tracing for a live QEMU since the monitor connection is already in use. Kinda need to have a second monitor instance present, that we can connect to for debugging the migration state. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|