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Re: kern/49195 (drm2 panic in i915_gem.c)
The following reply was made to PR kern/49195; it has been noted by GNATS.
From: Alan Barrett <apb%cequrux.com@localhost>
Subject: Re: kern/49195 (drm2 panic in i915_gem.c)
Date: Mon, 17 Nov 2014 18:16:06 +0200
On Mon, 17 Nov 2014, Alan Barrett wrote:
> >This seems to be fixed with revision 1.18 of i915_gem.c. Please test.
> I haven't yet tested that change. However, I can report that the
> problem appears with both AccelMethod "UXA" and AccelMethod "SNA"
> but not with Accel off, in this part of the xorg.conf file:
I have now tested with i915_gem.c revision 1.18. I still get the
write_domain panic with AccelMethod "SNA", although the back trace may
not always be the same.
With AccelMethod "UXA", I get such badly corrupted images that I didn't
test for long enough to see whtether it panics.
Here's a backtrace from the most recent write_domain panic.
#11 0xc0b62a34 in kern_assert (
fmt=fmt@entry=0xc0df5830 "kernel %sassertion \"%s\" failed: file \"%s\", line %d ") at src/sys/lib/libkern/kern_assert.c:51
#12 0xc03e7ad7 in i915_gem_object_move_to_inactive (obj=0xc868ef00)
#13 0xc03e7b46 in i915_gem_retire_requests_ring (ring=0xc4b24344)
#14 0xc03e9a57 in i915_gem_object_flush_active (obj=0xc868ef00)
#15 i915_gem_busy_ioctl (dev=0xc504564c, data=0xdd8e1eb0, file=0xc659f5e8)
#16 0xc02ea1dc in drm_ioctl (fp=0xc65a9c00, cmd=3221775447, data=0xdd8e1eb0)
#17 0xc09b8fd0 in sys_ioctl (l=0xc53fbd40, uap=0xdd8e1f68, retval=0xdd8e1f60)
#18 0xc09c4693 in sy_call (rval=0xdd8e1f60, uap=0xdd8e1f68, l=0xc53fbd40,
sy=<optimized out>) at src/sys/sys/syscallvar.h:61
#19 sy_invoke (code=54, rval=0xdd8e1f60, uap=0xdd8e1f68, l=0xc53fbd40,
sy=<optimized out>) at src/sys/sys/syscallvar.h:85
#20 syscall (frame=0xdd8e1fa8)
#21 0xc01005c6 in Xsyscall ()
#22 0xdd8e1fa8 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
--apb (Alan Barrett)
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