Re: [PATCH] ppc64: xtime <-> gettimeofday can get out of sync

[Benjamin Herrenschmidt]

> Note that the time_sync_xtime check only stops the seconds from going
> backwards, the ns component still could couldnt it? Considering this
> is hard to get right, should we switch to the time interpolator stuff?
> The only problem there is it might be trouble for systemcfg (which
> exports stuff to do userspace gettimeofday).

My userland implementation in the vDSO also relies on our current
algorithm. It's not merged yet and could be changed of course, but I
ended up quite liking our current code ;) 

The interesting thing with it is we are basically lock-less
(and even barrier-less on reads).

Ben.


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