CURRENT crashes with nvidia GPU BLOB : vm_radix_insert: key 23c078 is already present

[David Wolfskill]

On Fri, Aug 09, 2013 at 07:32:51AM +0200, O. Hartmann wrote:
> ...
> > > On 8 August 2013 11:10, O. Hartmann <ohartman at zedat.fu-berlin.de>
> > > wrote:
> > > > The most recent CURRENT doesn't work with the x11/nvidia-driver
> > > > (which is at 319.25 in the ports and 325.15 from nVidia).
> > > >
> > > > After build- and installworld AND successfully rebuilding port
> > > > x11/nvidia-driver, the system crashes immediately after a reboot
> > > > as soon the kernel module nvidia.ko seems to get loaded (in my
> > > > case, I load nvidia.ko via /etc/rc.conf.local since the nVidia
> > > > BLOB doesn't load cleanly everytime when loaded
> > > > from /boot/loader.conf).
> > > >
> > > > The crash occurs on systems with default compilation options set
> > > > while building world and with settings like -O3 -march=native. It
> > > > doesn't matter.
> > > >
> > > > FreeBSD and the port x11/nvidia-driver has been compiled with
> > > > CLANG.
> > > >
> > > > Most recent FreeBSD revision still crashing is r254097.
> > > >
> > > > When vmcore is saved, I always see something like
> > > >
> > > > savecore: reboot after panic: vm_radix_insert: key 23c078 is
> > > > already present
> > > >
> > > >
> > > > Does anyone has any idea what's going on?
> > > >
> > > > Thanks for helping in advance,
> > > >
> > > > Oliver
> > 
> > I'm seeing a complete deadlock on my T520 with today's current and
> > latest portsnap'd versions of ports for the nvidia-driver updates.
> > 
> > A little bisection and help from others seems to point the finger at
> > Jeff's r254025
> > 
> > I'm getting a complete deadlock on X starting, but loading the module
> > seems to have no ill effects.
> > 
> > Sean
> 
> Rigth, I loaded the module also via /boot/loader.conf and it loads
> cleanly. I start xdm and then the deadlock occurs.
> 
> I tried recompiling the whole xorg suite via "portmaster -f xorg xdm",
> it took a while, but no effect, still dying.
> .....

Sorry to be rather late to the party; the Internet connection I'm using
at the moment is a bit flaky.  (I'm out of town.)

I managed to get head/i386 @r254135 built and booting ... by removing
the "options DEBUG_MEMGUARD" from my kernel.

However, that merely prevented a (very!) early panic, and got me to the
point where trying to start xdm with the x11/nvidia-driver as the
display driver causes an immediate reboot (no crash dump, despite
'dumpdev="AUTO"' in /etc/rc.conf).  No drop to debugger, either.

Booting & starting xdm with the nv driver works -- that's my present
environment as I am typing this.

However, the panic with DEBUG_MEMGUARD may offer a clue.  Unfortunately,
it's early enough that screen lock/scrolling doesn't work, and I only
had the patience to write down partof the panic information.  (This is
on my laptop; no serial console, AFAICT -- and no device to capture the
output if I did, since I'm not at home.)

The top line of the screen (at the panic) reads:

s/kern/subr_vmem.c:1050

The backtrace has the expected stuff near the top (about kbd, panic, and
memguard stuff); just below that is:

vmem_alloc(c1226100,6681000,2,c1820cc0,3b5,...) at 0xc0ac5673=vmem_alloc+0x53/frame 0xc1820ca0

Caveat: that was hand-transcribed from the screen to papaer, then
hand-transcribed from paper to this email message.  And my highest grade
in "Penmanship" was a D+.

Be that as it may, here's the relevant section of subr_vmem.c with line
numbers (cut/pasted, so tabs get munged):

   1039 /*
   1040  * vmem_alloc: allocate resource from the arena.
   1041  */
   1042 int
   1043 vmem_alloc(vmem_t *vm, vmem_size_t size, int flags, vmem_addr_t *addrp)
   1044 {
   1045         const int strat __unused = flags & VMEM_FITMASK;
   1046         qcache_t *qc;
   1047 
   1048         flags &= VMEM_FLAGS;
   1049         MPASS(size > 0);
   1050         MPASS(strat == M_BESTFIT || strat == M_FIRSTFIT);
   1051         if ((flags & M_NOWAIT) == 0)
   1052                 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "vmem_alloc");
   1053
   1054         if (size <= vm->vm_qcache_max) {
   1055                 qc = &vm->vm_qcache[(size - 1) >> vm->vm_quantum_shift];
   1056                 *addrp = (vmem_addr_t)uma_zalloc(qc->qc_cache, flags);
   1057                 if (*addrp == 0)
   1058                         return (ENOMEM);
   1059                 return (0);
   1060         }
   1061
   1062         return vmem_xalloc(vm, size, 0, 0, 0, VMEM_ADDR_MIN, VMEM_ADDR_MAX,
   1063             flags, addrp);
   1064 }


This is at r254025.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Taliban: Evil men with guns afraid of truth from a 14-year old girl.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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