From nobody Sun Apr 28 22:57:34 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1493400949915332.3177659218229; Fri, 28 Apr 2017 10:35:49 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 74A64C05AD6A; Fri, 28 Apr 2017 17:35:48 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2892818EF4; Fri, 28 Apr 2017 17:35:48 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id C89A718523D1; Fri, 28 Apr 2017 17:35:47 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v3SHZk21027144 for ; Fri, 28 Apr 2017 13:35:46 -0400 Received: by smtp.corp.redhat.com (Postfix) id 51784A001E; Fri, 28 Apr 2017 17:35:46 +0000 (UTC) Received: from mx1.redhat.com (ext-mx05.extmail.prod.ext.phx2.redhat.com [10.5.110.29]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 49261A289C for ; Fri, 28 Apr 2017 17:35:41 +0000 (UTC) Received: from mail-pg0-f50.google.com (mail-pg0-f50.google.com [74.125.83.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BB59F800 for ; Fri, 28 Apr 2017 17:35:39 +0000 (UTC) Received: by mail-pg0-f50.google.com with SMTP id v1so18108133pgv.1 for ; Fri, 28 Apr 2017 10:35:39 -0700 (PDT) Received: from eswierk-sc.localdomain (67-207-112-138.static.wiline.com. [67.207.112.138]) by smtp.gmail.com with ESMTPSA id 79sm12950880pfh.38.2017.04.28.10.35.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 28 Apr 2017 10:35:38 -0700 (PDT) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 74A64C05AD6A Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=fail (p=quarantine dis=none) header.from=skyportsystems.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=libvir-list-bounces@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 74A64C05AD6A Authentication-Results: mx1.redhat.com; dkim=fail reason="signature verification failed" (1024-bit key) header.d=skyportsystems.com header.i=@skyportsystems.com header.b="U6GU6K2E" DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com BB59F800 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=pass (p=quarantine dis=none) header.from=skyportsystems.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=eswierk@skyportsystems.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com BB59F800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=skyportsystems.com; s=google; h=from:to:cc:subject:date:message-id; bh=NMFnyqGmqEBBefhSOJdPqobYWhbUb4XA2lkZOX3kltU=; b=U6GU6K2EzaTTxfkYWr+JvepJMUSZKe7R3miaMV1nVOnofX9PMVUOcdpre6swcLjpaa /DDcll3QHng17x/Resohkv2/+c8kntJgetrZLIEjdYXkYF9xKJOJwbXkvTp3cr4t0L98 wvf07Qm8maBjtP8S+pbr3Z9vXykhobS945W+c= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=NMFnyqGmqEBBefhSOJdPqobYWhbUb4XA2lkZOX3kltU=; b=QPiPw8nY2Vdw7awWFY9Sg4JP2+EGjT5T6p6KZ6kojOqSyblZOY3KqCAeOFd3mR74VJ 3FopqtaH/3+JuNl+qE8ow3TZF+BG+sJ7NVOiuHDUSj4Q2wfvNNi0J0VOOKTUJdYoFRvM hv2rrvSANfuAV2RHB9JmnqE0UBGXIdgnJAkmcstgzCgAPgkNNLM48y5w+aoZ3lzrThIs 8PBn7WA0awVUpujVeBcFKx3gK/SuT0FIJz8bxLDTbF0OvZje4bUewj4oIRfgR9Dcps6i yX7ULHX9/faMszCPnqGyVOC5tt0wUfoAFXT2Am7pJ5pvHfU0IksuEhNTuWfbbjihvKDG skoQ== X-Gm-Message-State: AN3rC/7aljpd4ftuJr7eI8t8V5vkdC2jPLVGHD9MhVPfnepBXpuXql3W S6a0wwVIIR8TSPc3ycdKGw== X-Received: by 10.99.37.71 with SMTP id l68mr4487098pgl.225.1493400939002; Fri, 28 Apr 2017 10:35:39 -0700 (PDT) From: Ed Swierk To: libvir-list@redhat.com Date: Fri, 28 Apr 2017 10:35:14 -0700 Message-Id: <1493400914-6040-1-git-send-email-eswierk@skyportsystems.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 28 Apr 2017 17:35:39 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 28 Apr 2017 17:35:39 +0000 (UTC) for IP:'74.125.83.50' DOMAIN:'mail-pg0-f50.google.com' HELO:'mail-pg0-f50.google.com' FROM:'eswierk@skyportsystems.com' RCPT:'' X-RedHat-Spam-Score: 0.769 (BAYES_50, DCC_REPUT_00_12, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, RCVD_IN_SORBS_SPAM, SPF_PASS) 74.125.83.50 mail-pg0-f50.google.com 74.125.83.50 mail-pg0-f50.google.com X-Scanned-By: MIMEDefang 2.78 on 10.5.110.29 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: libvir-list@redhat.com Cc: Ed Swierk Subject: [libvirt] [PATCH] docs: Add details about panic device behavior X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 28 Apr 2017 17:35:49 +0000 (UTC) X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" When a guest triggers the panic device, QEMU pauses the guest, and libvirt takes the action specified by on_crash. This can interfere with the guest's own crash handling actions (like writing a dump file and rebooting itself) if the guest triggers the panic device first (as Windows does via the Hyper-V crash CPU feature). This is not an obvious side effect of a notification mechanism, so it's worth explaining. Signed-off-by: Ed Swierk --- docs/formatdomain.html.in | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index e31a271..1c5fdb9 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -7078,7 +7078,11 @@ qemu-kvm -net nic,model=3D? /dev/null

panic device

panic device enables libvirt to receive panic notification from a QE= MU - guest. + guest. When the guest triggers the panic device, QEMU pauses the gue= st, and + libvirt takes the action specified by the on_crash elem= ent. + Note that this may interfere with the guest's own crash handling act= ions + (like writing a dump file and rebooting itself) if the guest trigger= s the + panic device first (as Windows does via the Hyper-V crash CPU featur= e). Since 1.2.1, QEMU and KVM only

--=20 1.9.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list