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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] GPU HANG: ecode 0:0x87d3bffa on ctx load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83677#c67">Comment # 67</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] GPU HANG: ecode 0:0x87d3bffa on ctx load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83677">bug 83677</a>
from <span class="vcard"><a class="email" href="mailto:hugegreenbug@gmail.com" title="Hugh Greenberg <hugegreenbug@gmail.com>"> <span class="fn">Hugh Greenberg</span></a>
</span></b>
<pre>This comment was the result of test with kernel 3.17.1 with the patch submitted
by Simon here.
only so far.(In reply to Hugh Greenberg from <a href="show_bug.cgi?id=83677#c64">comment #64</a>)
<span class="quote">> I just noticed that if I use this kernel option: i915.enable_ppgtt=0, I get
> a different hang:
>
> 8.562995] [drm] stuck on render ring
> [ 498.564286] [drm] GPU HANG: ecode 0:0x85dffffd, in Xorg [1161], reason:
> Ring hung, action: reset
> [ 498.564289] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
> stack, including userspace.
> [ 498.564290] [drm] Please file a _new_ bug report on bugs.freedesktop.org
> against DRI -> DRM/Intel
> [ 498.564291] [drm] drm/i915 developers can then reassign to the right
> component if it's not a kernel issue.
> [ 498.564293] [drm] The gpu crash dump is required to analyze gpu hangs, so
> please always attach it.
> [ 498.564294] [drm] GPU crash dump saved to /sys/class/drm/card0/error
> [ 507.545019] [drm] stuck on render ring
> [ 507.546315] [drm] GPU HANG: ecode 0:0x85dffffd, in Xorg [1161], reason:
> Ring hung, action: reset
> [ 507.546921] [drm:i915_context_is_banned] *ERROR* gpu hanging too fast,
> banning!
>
> It seems like this hang has been fixed here:
> <a href="https://www.libreoffice.org/bugzilla/show_bug.cgi?id=78533">https://www.libreoffice.org/bugzilla/show_bug.cgi?id=78533</a> , but when I
> compare the patch in that post with the kernel 3.17.1, there are things
> missing. For example, I see that this doesn't fully match up:
>
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2139,13 +2139,16 @@ void i915_init_vm(struct drm_i915_private *dev_priv,
> void i915_gem_free_object(struct drm_gem_object *obj);
> void i915_gem_vma_destroy(struct i915_vma *vma);
>
> -#define PIN_MAPPABLE 0x1
> -#define PIN_NONBLOCK 0x2
> -#define PIN_GLOBAL 0x4
> +#define PIN_OFFSET_FIXED 0x1
> +#define PIN_OFFSET_BIAS 0x2
> +#define PIN_MAPPABLE 0x4
> +#define PIN_NONBLOCK 0x8
> +#define PIN_GLOBAL 0x10
> +#define PIN_OFFSET_MASK (~4095)
>
>
> Is this something worth investigating, or am I wasting my time?</span ></pre>
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