Re: xhci panic

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

On Fri, Jan 20, 2017 at 02:10:24PM +0000, Nick Hudson wrote:
> On 01/20/17 11:50, Patrick Welche wrote:
> > On Fri, Jan 20, 2017 at 11:08:14AM +0000, Nick Hudson wrote:
> > > On 01/20/17 10:56, Patrick Welche wrote:
> > > > Just tried a this morning's kernel on amd64 (was looking forward to the
> > > > new xhci.c :-) ), and (laptop so no serial console):
> > > > 
> > > > xhci0 at pci4 dev 0 function 0: NEC USB3 Houst Controller (rev. 0x04)
> > > > xhci0: interrupting at msi2 vec 0
> > > > uvm_fault(0x..., 0x0, 1) -> e
> > > > 
> > > > Stopped in pid 0.1 (system) at netbsd:vmem_alloc
> > > > vmem_alloc
> > > > uvm_km_kmem_alloc
> > > > kmem_intr_alloc
> > > > kmem_intr_zalloc
> > > > xhci_init
> > > > xhci_pci_attach
> > > > ...
> > > > mp_pci_scan
> > > > 
> > > Can you boot with -x and send the output please
> > OK - going off-list!
> > 
> > P
> 
> can you show the full backtrace,e.g.
> 
> Stopped in pid 0.1 (system) at netbsd:vmem_alloc+FOO
> 
> need to know the source line of vmem_alloc+FOO is

(gdb) info line *(vmem_alloc+0x3e)
Line 1056 of "../../../../kern/subr_vmem.c"
   starts at address 0xffffffff8052efa2 <vmem_alloc+60>
   and ends at 0xffffffff8052efac <vmem_alloc+70>.

     1  /*      $NetBSD: subr_vmem.c,v 1.95 2016/07/07 06:55:43 msaitoh Exp $   */
...
  1050  #if defined(QCACHE)
  1051          if (size <= vm->vm_qcache_max) {
  1052                  void *p;
  1053                  int qidx = (size + vm->vm_quantum_mask) >> vm->vm_quantum_shift;
  1054                  qcache_t *qc = vm->vm_qcache[qidx - 1];
  1055  
  1056                  p = pool_cache_get(qc->qc_cache, vmf_to_prf(flags));
  1057                  if (addrp != NULL)
  1058                          *addrp = (vmem_addr_t)p;
  1059                  return (p == NULL) ? ENOMEM : 0;
  1060          }
  1061  #endif /* defined(QCACHE) */

For more, it'll be easier to do later when I'm near a second computer...
(I can boot this laptop with boot -c, disable xhci, using an envelope as
memory...)

Cheers,

Patrick