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

[Ed Maste]

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?
 
-Ed