Subject: Re: simple_lock: uninitialized lock
To: Antti Kantee <>
From: Patrick Welche <>
List: current-users
Date: 07/17/2007 12:57:06
On Mon, Jul 16, 2007 at 10:23:18PM +0300, Antti Kantee wrote:
> On Mon Jul 16 2007 at 19:31:52 +0100, Patrick Welche wrote:
> > Finally a panic while I'm not in X... Today's CVS on i386:
> Sounds like this is not the pilot or even first season.  Got a pointer
> to earlier episodes I've missed?

Not really - I never had anything to go on! If you would like the story :-)
There was that post about firefox being "parked", so I compiled a new
kernel on a single processor amd, and thereafter it kept freezing while
building the world, and I had some interesting file corruption e.g.
.depend files containg 0x0 or some binary. Then I came back to Cambridge
and had similar freezing experiences on a pentium 4 with hyperthreading
enabled, once again while building the world and in X. Then I tried
building the world from a console on a pentium M, that's when I finally
had the panic, and could get some information out!

Pleasant surprise: bt/l actually did write to disk, so
now with function arguments:

strlen(c0531a16,8,cbfb08c8,cbfb08ee,cbfb099c) at netbsd:strlen+0x8
vsnprintf(cbfb08ee,96,c0531a16,cbfb0998,0) at netbsd:vsnprintf+0x42
lock_printf(c0531a16,deadbeef,ffffbeef,b8,c) at netbsd:lock_printf+0x5f
_simple_lock(ce707ef8,c0532945,b8,c05355dd,c059e534) at netbsd:_simple_lock+0x8c
ltsleep(ce707ef8,14,c05355dd,0,ce707ef8) at netbsd:ltsleep+0x18f
acquire(0,600,c02684ef,c02ce028,cacb3028) at netbsd:acquire+0xb0
_lockmgr(ce707ef8,10002,ce707e68,c056b55c,8fd) at netbsd:_lockmgr+0x507
ufs_lock(cbfb0ae0,0,afc,c04bcb60,ce707e68) at netbsd:ufs_lock+0x4f
VOP_LOCK(ce707e68,10002,cbfb0b2c,c04bcb60,ce707e68) at netbsd:VOP_LOCK+0x25
vn_lock(ce707e68,10002,50a,10012,10) at netbsd:vn_lock+0x9f
vrele(ce707e68,10012,4ab,c032bf87,cc6acae8) at netbsd:vrele+0x130
vget(ce707e68,10012,544,0,0) at netbsd:vget+0x90
ffs_sync(c13e5000,3,cad40ee0,cad4c1c0,d) at netbsd:ffs_sync+0xde
sync_fsync(cbfb0c08,10012,cbfb0c2c,c0336a7f,cc02b118) at netbsd:sync_fsync+0xaa
VOP_FSYNC(cc02b118,cad40ee0,8,0,0) at netbsd:VOP_FSYNC+0x49
sched_sync(cad4c1c0,0,c01002ac,fbff,c01002ac) at netbsd:sched_sync+0xf5

The kernel dump I got isn't much use because I got another panic while

Now trying again with your patch...