Re: kern/53441: nouveau panic in 8.0_RC2 amd64

[Greg Oster <oster%netbsd.org@localhost>]

The following reply was made to PR kern/53441; it has been noted by GNATS.

From: Greg Oster <oster%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/53441: nouveau panic in 8.0_RC2 amd64
Date: Sat, 11 Aug 2018 15:08:44 -0600

 On Sat, 11 Aug 2018 03:10:01 +0000 (UTC)
 Greg Oster <oster%netbsd.org@localhost> wrote:
 
 > The following reply was made to PR kern/53441; it has been noted by
 > GNATS.
 > 
 > From: Greg Oster <oster%netbsd.org@localhost>
 > To: Taylor R Campbell <campbell%mumble.net@localhost>
 > Cc: gnats-bugs%NetBSD.org@localhost
 > Subject: Re: kern/53441: nouveau panic in 8.0_RC2 amd64
 > Date: Fri, 10 Aug 2018 21:05:16 -0600
 > 
 >  On Fri, 10 Aug 2018 23:26:31 +0000
 >  Taylor R Campbell <campbell%mumble.net@localhost> wrote:
 >  
 >  > Please try the attached patch and let me know if it helps.  
 >  
 >  Now running a kernel with the patch.  Will let you know what
 >  happens.
 
 Keeled over again early this afternoon (I wasn't even sitting at the
 machine at the time).
 
 uvm_fault(0xfffffe8433abd8c0, 0x0, 1) -> e
 fatal page fault in supervisor mode
 trap type 6 code 0 rip 0xffffffff8114d7d5 cs 0x8 rflags 0x13282 cr2 0x8
 ilevel 0 rsp 0xffff800141d3ac20 curlwp 0xfffffe843792d260 pid 161.1
 lowest kstack 0xffff800141d382c0 panic: trap
 cpu0: Begin traceback...
 vpanic() at netbsd:vpanic+0x219
 vpanic() at netbsd:vpanic
 trap() at netbsd:trap+0x2b9
 --- trap (number 6) ---
 nouveau_fence_wait_uevent() at netbsd:nouveau_fence_wait_uevent+0x21
 nouveau_fence_wait() at netbsd:nouveau_fence_wait+0x5e
 nouveau_bo_fence_wait() at netbsd:nouveau_bo_fence_wait+0x2c
 ttm_bo_wait() at netbsd:ttm_bo_wait+0x1a0
 nouveau_gem_ioctl_cpu_prep() at netbsd:nouveau_gem_ioctl_cpu_prep+0xa2
 drm_ioctl() at netbsd:drm_ioctl+0x248
 sys_ioctl() at netbsd:sys_ioctl+0x4eb
 sy_call() at netbsd:sy_call+-0x2918aa
 sy_invoke() at netbsd:sy_invoke+0xd5
 syscall() at netbsd:syscall+0xff
 --- syscall (number 54) ---
 73cc0a0fedfa:
 cpu0: End traceback...
 
 I have a crash dump if details from there would be interesting.
 
 Thanks.
 
 Later...
 
 Greg Oster