armv6 pmap patch

[Aleksandr Rybalko]

On Sat, 29 Sep 2012 03:02:21 -0500
Alan Cox <alc at rice.edu> wrote:

> On 09/28/2012 08:02, Aleksandr Rybalko wrote:
> > On Mon, 10 Sep 2012 11:49:31 -0500
> > Alan Cox<alc at rice.edu>  wrote:
> >
> >>> On 09/10/2012 04:18, Andrew Turner wrote:
> >>>> On Sat, 08 Sep 2012 19:01:26 -0500
> >>>> Alan Cox<alc at rice.edu>   wrote:
> >>>>
> >>>>> Can someone here please test this patch to the new armv6 pmap?
> >>>>> It eliminates the use of the page queues lock and updates some
> >>>>> comments. Similar changes were recently made to the original arm
> >>>>> pmap.
> >>>>>
> >>>>> Thanks,
> >>>>> Alan
> >>>>>
> >>>> I have booted FreeBSD with the patch on a Pandaboard and it
> >>>> appears to work. Are there any tests you would like me to run?
> >>>>
> >>> Nothing in particular, since almost anything that you do on the
> >>> machine will exercise the changed code.
> >>>
> >>> There appears to be a lot of unnecessary dropping and reacquiring
> >>> of locks around UMA calls in both pmap.c and pmap-v6.c.  I will
> >>> try to generate a patch to eliminate this later in the week.
> >>>
> >>> Alan
> >>>
> > Hi Alan and ARM hackers,
> >
> > Don't know exact, but think it is related to current pmap work.
> > So here is two panics observed on R-Pi recently (HEAD @r240985),
> > both on attempt to untar ports.tar.gz :)
> >
> 
> *snip*
> 
> The attached patch should eliminate the panic.  Please let me know
> when you've had a chance to test it.

I don't know when it done (extracting ports.tar.gz :) ) but it still
works w/o panic :)

Thanks a lot Alan!

> 
> Alan
> 

WBW
-- 
Aleksandr Rybalko <ray at freebsd.org>