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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - System crashes after "[drm] IP block:gmc_v8_0 is hung!" / [drm] IP block:sdma_v3_0 is hung!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102322#c16">Comment # 16</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - System crashes after "[drm] IP block:gmc_v8_0 is hung!" / [drm] IP block:sdma_v3_0 is hung!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102322">bug 102322</a>
from <span class="vcard"><a class="email" href="mailto:alexdeucher@gmail.com" title="Alex Deucher <alexdeucher@gmail.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
<pre>(In reply to Andrey Grodzovsky from <a href="show_bug.cgi?id=102322#c15">comment #15</a>)
<span class="quote">> I think it just means systems with large VRAM so it will require large BAR
> for mapping. But I am not sure on that point.</span >
That's correct. the updates are done with the CPU rather than the GPU (SDMA).
The default BAR size on most systems is usually 256MB for 32 bit compatibility
so the window for CPU access to vram (where the page tables live) is limited.</pre>
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