Re: [PATCH v4 00/17] 64-bit friendly generic sched_clock()

[Will Deacon]

On Fri, Jul 19, 2013 at 12:59:44AM +0100, John Stultz wrote:
> On 07/18/2013 04:21 PM, Stephen Boyd wrote:
> > This patchset adds support for 64 bit counters in the generic
> > sched_clock code and converts drivers over to use it. Based
> > on v3.11-rc1.
> >
> > Changes since v3:
> >   * Move to use seqcount to fix issues with 64-bit cyc counters
> >   * Move to hrtimer to fix underflow/overflow errors in wraparound
> >     calculation
> >   * Use of 1 hour in clocks_calc_mult_shift
> >   * Converted over drivers in drivers/clocksource
> 
> I've not been able to take a deep review yet, but this looks pretty much 
> like what we discussed last week, so I'm happy with it so far. Has this 
> gotten much testing (on both 32 and 64bit systems?)
> 
> One detail: Most of this is likely to go in via tip/timers/core, but the 
> 5/17 "arch_timer: Move to generic sched_clock" will need some 
> synchronization with Catalin to make sure its ok to go in via tip. Not 
> sure what other arm64 changes are pending that would depend or collide 
> with that change.

I wouldn't expect anything more than a trivial Kconfig clash with the arm64
tree, if that.

Will
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