Re: kern/50060: kernel crash with i915drmksm on Intel 965Q

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/50060; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/50060: kernel crash with i915drmksm on Intel 965Q
Date: Sat, 18 Jul 2015 19:11:25 +0000

 On Sat, Jul 18, 2015 at 01:30:01AM +0000, nisimura%netbsd.org@localhost wrote:
  > i915drmksm0 at pci0 dev 2 function 0: vendor 0x8086 product 0x2992 (rev. 0x02)
  > DRM error in i915_gmch_probe: failed to set up gmch
 
 Is this the real problem? (that is, the subsequent crash then reflects
 bad handling of the failure condition) ... or is it supposed to be
 harmless/noncritical?
 
  > uvm_fault(0xffffffff8104b240, 0x7fc000231000, 2) -> e
  > fatal page fault in supervisor mode
  > trap type 6 code 2 rip ffffffff809cb323 cs 8 rflags 10246 cr2 7fc000231000 ilevel 8 rsp ffffffff812657e8
  > curlwp 0xffffffff81000540 pid 0.1 lowest kstack ffffffff812632c0
  > kernel: page fault trap, code=0
  > Stopped in pid 0.1 (system) at  netbsd:_atomic_swap_64+0x3: xchgq %rax,0(%rdi)
 
 Can you send the stack trace?
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost