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Mon, 14 Oct 2024 18:48:27 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 215EA20043; Mon, 14 Oct 2024 18:48:27 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2820620040; Mon, 14 Oct 2024 18:48:26 +0000 (GMT) Received: from osiris (unknown [9.171.66.174]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTPS; Mon, 14 Oct 2024 18:48:26 +0000 (GMT) Date: Mon, 14 Oct 2024 20:48:24 +0200 From: Heiko Carstens To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, virtualization@lists.linux.dev, linux-doc@vger.kernel.org, kvm@vger.kernel.org, Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Huth , Cornelia Huck , Janosch Frank , Claudio Imbrenda , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Andrew Morton , Jonathan Corbet , Mario Casquero Subject: Re: [PATCH v2 5/7] virtio-mem: s390 support Message-ID: <20241014184824.10447-F-hca@linux.ibm.com> References: <20241014144622.876731-1-david@redhat.com> <20241014144622.876731-6-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241014144622.876731-6-david@redhat.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: uxrAbvVrvo_xSFv3iSYJ1lcmH8ghEeSX X-Proofpoint-ORIG-GUID: s1Vm0XBS-RoBWitXsY0-xWCcYcWAwN3a X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-14_12,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 suspectscore=0 lowpriorityscore=0 adultscore=0 mlxscore=0 malwarescore=0 phishscore=0 spamscore=0 mlxlogscore=270 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410140131 X-Rspam-User: X-Rspamd-Queue-Id: 5A5BF1A0011 X-Rspamd-Server: rspam01 X-Stat-Signature: he9a7dqhcg4zed85ybqs39o51in3zcbj X-HE-Tag: 1728931705-324454 X-HE-Meta: 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 HYZbkp/H P9Ma8sUercwFWujyJMLWO6O1nu8GiFVH/st8Z1jG/p8EzlcP6TRqJWF1+tn8ZbXEjIoNDEgebmLt95sWYImjKFw/3bRDtPEmrAnLzZ8klDkxPoBP3JiqrqP0izyWA5cWb8Fx/zCtjEzZuSxJjrwhfKuTxW7ZwGvAeGX1gpH1blI6dqY1Yxi8thOELgwykeOaU4V7nLCPO546acF8wIYgvqBXx1jYTAvl2hhE9 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Oct 14, 2024 at 04:46:17PM +0200, David Hildenbrand wrote: > The special s390 kdump mode, whereby the 2nd kernel creates the ELF > core header, won't currently dump virtio-mem memory. The virtio-mem > driver has a special kdump mode, from where we can detect memory ranges > to dump. Based on this, support for dumping virtio-mem memory can be > added in the future fairly easily. Hm.. who will add this support? This looks like a showstopper to me. Who is supposed to debug crash dumps where memory parts are missing?