Re: [PATCH 0/4] avoid double timer interrupt with nohz and Intel TSC

2016-07-10 Thread Nicolai Stange
Please drop in favour of v2. Thanks, Nicolai

[PATCH 0/4] avoid double timer interrupt with nohz and Intel TSC

2016-07-10 Thread Nicolai Stange
With a single task running on a NOHZ CPU on an Intel Haswell, I recognized that I did not only get the one expected local_timer APIC interrupt, but two per second at minimum. Further tracing showed that the first one preceedes the programmed deadline by up to ~50us and hence, it did nothing except