2018-09-26 18:36 GMT+01:00 Eric W. Biederman ebiederm@xmission.com:
The advantage of timekeeping_update per time namespace is that it allows different lengths of seconds per time namespace. Which allows testing ntp and the kernel in interesting ways while still having a working production configuration on the same system.
Just a quick note: the different length of second per namespace sounds very interesting in my POV, I remember I've seen this article: http://publish.illinois.edu/science-of-security-lablet/files/2014/05/DSSnet-...
And their realisation with a simulation of time going with different speed per-pid (with vdso disabled): https://github.com/littlepretty/VirtualTimeKernel
Thanks, Dmitry