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

[Arnd Bergmann <arnd@arndb.de>]

On Tuesday 04 November 2014 11:49:04 Thomas Gleixner wrote:
> On Tue, 4 Nov 2014, Richard Cochran wrote:
> 
> > On Tue, Nov 04, 2014 at 09:01:31AM +0100, Arnd Bergmann wrote:
> > > On Monday 03 November 2014 17:11:53 John Stultz wrote:
> > > > 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