Re: [RFC][PATCH 3/3] locking/qspinlock: Optimize for x86

[Peter Zijlstra]

On Thu, Sep 27, 2018 at 09:47:48AM +0200, Andrea Parri wrote:
> > LKMM in particular does _NOT_ deal with mixed sized atomics _at_all_.
> 
> True, but it is nothing conceptually new to deal with: there're Cat
> models that handle mixed-size accesses, just give it time.

Sure, but until that time I must not rely on (and thus not use) LKMM for
qspinlock things.

So while your argument about coherence might be true -- I'll have to
think about it; litmus tests are out the window.