[Intel-gfx] [PATCH] [RFC] kernel/cpu: Use lockref for online CPU reference counting

[Peter Zijlstra]

On Wed, Feb 17, 2016 at 02:47:31PM +0200, Joonas Lahtinen wrote:
> On ti, 2016-02-16 at 12:07 +0100, Peter Zijlstra wrote:
> > On Tue, Feb 16, 2016 at 12:51:03PM +0200, Joonas Lahtinen wrote:
> > > Quoting my original patch;
> > > 
> > > "See the Bugzilla link for more details.
> > 
> > If its not in the Changelog it doesn't exist. Patches should be self
> > contained and not refer to external sources for critical information.
> 
> The exact locking case in CPUfreq drivers causing a splat is described
> in the patch. Details were already included, that's why term "more
> details" was used.

Barely. What was not described was why you went to tinker with the
hotplug lock instead of sanitizing cpufreq. Nor why your chosen solution
is good.

> This is not exactly taking us closer to a fix, 

Why you think we can discuss fixes if you've not actually described your
problem is beyond me.