Re: panic with LOCKDEBUG

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On Monday 19 May 2008 15:32:42 Sverre Froyen wrote:
> On Monday 19 May 2008, Christoph Egger wrote:
> > Hi!
> >
> > An amd64 GENERIC kernel 4.99.63 with LOCKDEBUG panics by just typing
> > "envstat"
> >
> > $ envstat
> > Reader / writer lock error: lockdebug_wantlock: locking against myself
> >
> > lock address : 0xffff80004bc51fa0 type     :     sleep/adaptive
> > shared holds :                  1 exclusive:                  0
> > shares wanted:                  1 exclusive:                  0
> > current cpu  :                  1 last held:                  1
> > current lwp  : 0xffff800050314460 last held: 0xffff800050314460
> > last locked  : 0xffffffff8070df1a unlocked : 0xffffffff8070df57
> > initialized  : 0xffffffff8070e9af
> > owner/count  : 0x0000000000000010 flags    : 0x0000000000000008
> >
> > Turnstile chain at 0xffffffff80c7ec00.
> > => No active turnstile for this lock.
> >
> > panic: LOCKDEBUG
> > Stopped in pid 605.1 (envstat) at       netbsd:breakpoint+0x5:  leave
> > db{1}> bt
> > breakpoint() at netbsd:breakpoint+0x5
> > panic() at netbsd:panic+0x257
> > lockdebug_abort1() at netbsd:lockdebug_abort1+0xd3
> > rw_vector_enter() at netbsd:rw_vector_enter+0x2f1
> > prop_dictionary_iterator() at netbsd:prop_dictionary_iterator+0x77
> > prop_dictionary_iterator() at netbsd:prop_dictionary_iterator+0x14a
> > prop_dictionary_externalize() at netbsd:prop_dictionary_externalize+0x40
> > __main() at netbsd:__main+0x13e
> > sysmonioctl_envsys() at netbsd:sysmonioctl_envsys+0x4da
> > VOP_IOCTL() at netbsd:VOP_IOCTL+0x6b
> > vn_ioctl() at netbsd:vn_ioctl+0x6d
> > sys_ioctl() at netbsd:sys_ioctl+0x134
> > syscall() at netbsd:syscall+0x9a
> > db{1}>
>
> Try the patch provided by Yamamoto Takashi in
>
> http://mail-index.netbsd.org/current-users/2008/05/13/msg002424.html

This patch does not apply cleanly.
yamamoto: can you provide new version, please?

Christoph