On Fri, 2014-06-06 at 17:06 +0200, Peter Zijlstra wrote: > On Mon, Jun 02, 2014 at 10:09:35AM -0700, Linus Torvalds wrote: > > On Mon, Jun 2, 2014 at 9:25 AM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > > > > And I can't say I'm a particular fan of these ops either, as alternative > > > I'm almost inclined to just exclude parisc from using opt spinning. > > > > Please do. > > Something like so; if the rwsem stuff lands in .15 we need more for > that, it doesn't have a convenient CONFIG symbol like this. > > Linus will you take this from email, or should I get it through > tip/locking/urgent or so? > > --- > Subject: locking, mutex: Disable optimistic spinning for PA-RISC > > PA-RISC's cmpxchg is not save against normal stores and the code used > for optimistic spinning is known broken because of this. > > Disable for now. I almost hit the send button :) > > Reported-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > --- Reviewed-by: Davidlohr Bueso <davidlohr@xxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
