arm pmap locking

[Ian Lepore]

On Mon, 2012-09-03 at 17:54 -0500, Alan Cox wrote:
> On 08/30/2012 13:12, Ian Lepore wrote:
> > On Tue, 2012-08-28 at 13:49 -0500, Alan Cox wrote:
> >> Can you please retry with the attached patch?  For the time being, I
> >> decided to address the above problem by simply enabling recursion on the
> >> new pmap lock.  As I mentioned in my prior message, the lock recursion
> >> in the arm pmap is a mistake.  However, I'd rather not change two things
> >> at once, i.e., replace the page queues lock and fix the lock recursion.
> >> I'll take a look at eliminating the lock recursion later this week.
> >>
> >> Thanks,
> >> Alan
> >>
> > Sorry for the delay, I finally got around to trying this today, and it
> > seems to be working well initially -- it boots to multiuser and the only
> > difference in the dmesg.boot with and without the patch is the compile
> > date, and the kernel image is 128 bytes smaller with the patch.  I've
> > got DIAGNOSTIC and INVARIANTS enabled; I'll run with the patch in place
> > and let you know if anything glitches.
> >
> 
> Could you please test the attached patch?  This is a small step toward 
> disentangling the arm pmap locking.
> 
> Alan
> 

Applied the patch, it's running just fine.

-- Ian