Re: [PATCH] to fix xtime lock for in the RT kernel patch

[George Anzinger]

Ingo Molnar wrote:
> * George Anzinger <george@xxxxxxxxxx> wrote:
>
>
> > What I am suggesting is spliting the mark code so that it would only
> > grap the offset (current TSC in most systems) during interrupt
> > processing.  Applying this would be done later in the thread.  Since
> > it is not applying the offset, the xtime_lock would not need to be
> > taken.
>
>
> ok, you are right, and this would be fine with me. Wanna take a shot at
> it? I've uploaded the -03 patch which is my most current tree. (with the
> do_timer() moving done already.) I've reviewed the TSC offset codepath
> again and i'm not sure where i got the 10 usecs from ... it's a pretty
> cheap codepath that can be done in the direct interrupt just fine.
Tomorrow, uh, later today.  Need some sleep now...
--
George Anzinger   george@xxxxxxxxxx
High-res-timers:  http://sourceforge.net/projects/high-res-timers/

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