On Mon, Jun 14, 2021 at 12:32:01PM -0400, Waiman Long wrote: > On 6/14/21 11:52 AM, Greg KH wrote: > > On Mon, Jun 14, 2021 at 11:23:06AM -0400, Waiman Long wrote: > > > Make /sys/devices/system/cpu/cpu<n>/online file to show a cpu as > > > offline if it is not a valid cpu in a proper cpuset context when the > > > cpuset_bound_cpuinfo sysctl parameter is turned on. > > This says _what_ you are doing, but I do not understand _why_ you want > > to do this. > > > > What is going to use this information? And now you are showing more > > files than you previously did, so what userspace tool is now going to > > break? > > One reason that is provided by the customer asking for this functionality is > because some applications use the number of cpu cores for licensing purpose. > Even though the applications are running in a container with a smaller set > of cpus, they may still charge as if all the cpus are available. They ended > up using a bind mount to mount over the cpuX/online file. Great, then stick with the bind mount for foolish things like that. There's no technical reason for doing this then, just marketing? thanks, greg k-h
