Am 31.10.2015 um 17:22 schrieb Anton Ivanov:
> Richard, can you send me your config.

Sure. It is basically a defconfig.

> I have had it running for a couple of days before submission both under load and idle it was doing OK.

Well, what userspace did you try?
I did some more tests, if nanosleep() is called periodically the issue does not arise.
Maybe your userspace (systemd?) fires the syscall too often. ;)

Thanks,
//richard