Re: CVS commit: src/sys [freeze on boot]

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Mon, Jan 20, 2020 at 04:12:45PM +0000, Patrick Welche wrote:
> On Mon, Jan 20, 2020 at 12:51:00PM +0000, Andrew Doran wrote:
> > This also happened the last time I touched rw_downgrade(), and I backed out
> > the change then, but both times I don't see the bug.  I have some questions:
> > 
> > - Are you running DIAGNOSTIC and/or LOCKDEBUG?  I would be very interested
> >   to see what happens with a LOCKDEBUG kernel here.
> 
> One worked with the addition of LOCKDEBUG. The other didn't, but it seems
> to be unrelated:
> 
> db{0}> show panic
> Panic string: mutex_vector_enter,510: uninitialized lock (lock=0xffffbd012366609
> 0, from=ffffffff8033dc9d)
> bt
> breakpoint() at netbsd:breakpoint+0x5
> vpanic() at netbsd:vpanic+0x178
> snprintf() at netbsd:snprintf
> lockdebug_wantlock() at netbsd:lockdebug_wantlock+0x166
> mutex_enter() at netbsd:mutex_enter+0x37c
> ixgbe_getext() at netbsd:ixgbe_getext+0x1d

ixgbe_getext does mutex_enter(&eh->eh_mtx) but...

> ixgbe_jcl_freeall.isra.0() at netbsd:ixgbe_jcl_freeall.isra.0+0xd6
> ixgbe_jcl_destroy() at netbsd:ixgbe_jcl_destroy+0x14

... ixgbe_jc_destroy does mutex_destroy(&eh->eh_mtx)