Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752599AbdGFKsV (ORCPT ); Thu, 6 Jul 2017 06:48:21 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:55485 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752317AbdGFKsR (ORCPT ); Thu, 6 Jul 2017 06:48:17 -0400 From: Claudio Imbrenda To: kvm@vger.kernel.org Cc: borntraeger@de.ibm.com, pbonzini@redhat.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/1] Date: Thu, 6 Jul 2017 12:48:06 +0200 X-Mailer: git-send-email 2.7.4 X-TM-AS-GCONF: 00 x-cbid: 17070610-0016-0000-0000-000004D02A10 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17070610-0017-0000-0000-00002803979B Message-Id: <1499338087-20440-1-git-send-email-imbrenda@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-07-06_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1707060186 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1253 Lines: 33 This patch adds a few lines to the KVM common code to fire a KOBJ_CHANGE uevent whenever a KVM VM is created or destroyed. The event carries four environment variables: KVM_VM_CREATED indicates how many times a new VM has been created. It is useful for example to trigger specific actions when the first VM is started KVM_VM_COUNT indicates how many VMs are currently active. This can be used for logging or monitoring purposes KVM_VM_PID has the pid of the KVM process that has been started or stopped. This can be used to perform process-specific tuning. KVM_VM_STATS_PATH contains the path in /sys to the directory with all the runtime statistics for this VM. This is useful for performance monitoring and profiling. Specific udev rules can be then set up in userspace to deal with the creation or destruction of VMs as needed. v1 -> v2: * added KVM_VM_PID and KVM_VM_STATS_PATH * some cleanup, the patch should look nicer now * rebased on 4.12 Claudio Imbrenda (1): KVM: trigger uevents when starting or stopping a VM virt/kvm/kvm_main.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) -- 2.7.4