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SubjectRe: kernel BUG at drivers/gpu/drm/i915/i915_gem
From
Hi Rocko,

Thanks for the bug report. Please report bugs always on the public
mailing list so that all interest people can join in (also I'm
travelling atm, so I can't do much).
Afaics we're hitting

BUG_ON(seqno == 0)

in wait_requst. Unfortunately you've cut out the backtrace from the
kernel oops, so I can't tell anything more.

Please add the full dmesg and the usual details about your macine.

Yours, Daniel

On Fri, Dec 9, 2011 at 00:11, Rocko Requin <rockorequin@hotmail.com> wrote:
> Hi Daniel,
>
> Since I applied commit eb1711bb94991e93669c5a1b5f84f11be2d51ea1 (drm/i915:
> fix infinite recursion on unbind due to ilk vt-d w/a) to my kernel yesterday
> afternoon, I've had the kernel lock up completely three times on me, so I'm
> assuming it might have been the cause. (I was previously using a kernel
> compiled from git on Dec 4th without problems.)
>
> The last lockup showed this in the syslog:
>
> Dec  9 06:23:15 sierra kernel: [44486.289428] kernel BUG at
> drivers/gpu/drm/i915/i915_gem.c:1952!
> Dec  9 06:23:15 sierra kernel: [44486.289460] invalid opcode: 0000 [#1] SMP
> ...
> Dec  9 06:23:15 sierra kernel: [44486.289844] RIP:
> 0010:[<ffffffffa02eccd3>]  [<ffffffffa02eccd3>]
> i915_wait_request+0x563/0x580 [i915]
>
> I have attached a longer version of the log (but note that it was truncated
> by the crash).
>
> I am booting the kernel with i915.i915_enable_rc6=1 but I didn't have any
> lockup issues until yesterday.
>
> Thanks,
> rocko



--
Daniel Vetter
daniel.vetter@ffwll.ch - +41 (0) 79 365 57 48 - http://blog.ffwll.ch
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