remove debug.mpsafevfs tunable? (was Re: head panic: mutex Giant owned at /d2/emaste/svn-head/src/sys/geom/geom_dev.c:184)

[Kostik Belousov]

On Thu, Jul 03, 2008 at 03:16:48PM -0400, Ed Maste wrote:
> On Thu, Jul 03, 2008 at 09:58:33PM +0300, Kostik Belousov wrote:
> 
> > On Thu, Jul 03, 2008 at 02:14:31PM -0400, Ed Maste wrote:
> > >
> > > Loading configuration files.
> > > panic: mutex Giant owned at /d2/emaste/svn-head/src/sys/geom/geom_dev.c:184
> > > cpuid = 0
> > > KDB: enter: panic
> > > [thread pid 35 tid 100069 ]
> > > Stopped at      kdb_enter+0x3a: movl    $0,kdb_why
> > > db>
> > > [...]
> >
> > Do you have sysctl debug.mpsafevfs=0 ?
> 
> It turns out that due to an artifact of my lab environment, the tunable
> debug.mpsafevfs=0 was being set -- thanks for the suggestion!
> 
> Since it seems the tunable doesn't work properly anymore, and probably
> isn't at needed at all, should we just remove it?

I would not object against it.
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