Re: [PATCH v3 0/3] perf: User/kernel time correlation and event generation

On Tuesday 04 November 2014 11:49:04 Thomas Gleixner wrote:

On Tue, 4 Nov 2014, Richard Cochran wrote:

quoted

On Tue, Nov 04, 2014 at 09:01:31AM +0100, Arnd Bergmann wrote:

quoted

On Monday 03 November 2014 17:11:53 John Stultz wrote:

quoted

I've got some thoughts on what a possible interface that wouldn't be
awful could look like, but I'm still hesitant because I don't really
know if exposing this sort of data is actually a good idea long term.

 
I was also thinking (while working on an unrelated patch) we could use
a system call like

int clock_getoffset(clockid_t clkid, struct timespec *offs);

We might make *offs a timespec64 or u64 

I don't think we are ready yet to introduce timespec64 in the uapi
headers, this needs some more careful planning. Otherwise I agree
it's bad to introduce syscalls that we already know will become
obsolete soon.

	Arnd