2016-10-14 17:02+1100, Suraj Jitindar Singh: > Various kvm vm and vcpu stats are provided via debugfs entries. > Currently there is no way to reset these stats back to zero for the system > except by stopping all vms. It is not really resetting, just a special case of current behavior -- top-level stats are a sum of all existing VMs/VCPUs, so we would see 0 if they all had 0. > Add the ability to clear (reset back to zero) these stats on a per stat > basis by writing to the debugfs files. I can see this being used before a test, but the userspace could also read the value instead of writing and subtract it from the value after the test to get a similar result. The userspace-only solution is insufficient? When and what do you zero? > The stats are just reset to zero > irrespective of what is actually written to the file. Sounds good. Setting the val would be as simple, but there shouldn't be a reason to and it is a debug interface, so we can change it anytime. > Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@xxxxxxxxx> > --- I have applied it to kvm/queue for the moment, thanks. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
