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authorClaudio Imbrenda <imbrenda@linux.vnet.ibm.com>2017-07-12 17:56:44 +0200
committerRadim Krčmář <rkrcmar@redhat.com>2017-07-12 22:38:31 +0200
commit286de8f6ac9202f1c9012784639156c6ec386eb8 (patch)
tree3302d4f898eb64d984e35de560174c9c16148b9c /include/uapi
parent89c8a4984fc98e625517bfe5083342d77ee35811 (diff)
KVM: trigger uevents when creating or destroying a VM
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 five environment variables: 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 COUNT indicates how many VMs are currently active. This can be used for logging or monitoring purposes PID has the pid of the KVM process that has been started or stopped. This can be used to perform process-specific tuning. STATS_PATH contains the path in debugfs to the directory with all the runtime statistics for this VM. This is useful for performance monitoring and profiling. EVENT described the type of event, its value can be either "create" or "destroy" Specific udev rules can be then set up in userspace to deal with the creation or destruction of VMs as needed. Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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