Date: Fri, 10 Apr 2015 20:20:09 -0600 From: Ian Lepore <ian@freebsd.org> To: Pratik Singhal <ps06756@gmail.com> Cc: freebsd-hackers <freebsd-hackers@freebsd.org>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, Svatopluk Kraus <onwahe@gmail.com> Subject: Re: pmap_demote_section: No l2_bucket for wired mapping panic Message-ID: <1428718809.1182.31.camel@freebsd.org> In-Reply-To: <CAGf2gkOG_xGCXY5VyEWLq-rMM6iN_A2=6%2BDftAMa63MLcTX00Q@mail.gmail.com> References: <CAGf2gkObDLv1-hWV=TmDOYuDr4FZTnpkZaKXxvBZxiqix4kHvg@mail.gmail.com> <CAFHCsPUrzm=UkGe_0gvzOmVTTxLPT=as5N-=zWJxKeJKfaUVvg@mail.gmail.com> <CAGf2gkOG_xGCXY5VyEWLq-rMM6iN_A2=6%2BDftAMa63MLcTX00Q@mail.gmail.com>
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Reply at the bottom, where it belongs.
On Sat, 2015-04-11 at 06:58 +0530, Pratik Singhal wrote:
> I have double checked everything, recompiled kernel from scratch imade sure
> that I ncluded the line "options ARM_NEW_PMAP" in the kernel configuration
> file and I am still getting the same panic.
>
> Is there something at runtime that I can do to make sure that the kernel I
> am running is compiled with ARM_NEW_PMAP ?
>
>
>
> On Sat, Apr 11, 2015 at 4:31 AM, Svatopluk Kraus <onwahe@gmail.com> wrote:
>
> > The point of ARM_NEW_PMAP option is that there are no l2_buckets in
> > new armv6 pmap. So, as long as you get same panic, you are not running
> > kernel compiled with ARM_NEW_PMAP option.
> >
> > Svatopluk Kraus
> >
> >
[...]
> > >
>From the announcement of the ARM_NEW_PMAP option...
If you need to check whether the new or old code is running on a
system, use "sysctl vm.pmap.pte1.promotions", if that gives an
"unknown oid" error you're running the old code.
Other evidence:
revolution > grep l2_bucket pmap-v6-new.c
revolution >
You can't be getting a panic about l2_bucket stuff from code that
doesn't have anything in it about l2 buckets. Something must have gone
wrong with the way you built and installed the new kernel.
-- Ian
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