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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - r600g (HD 6950 Cayman) fails piglit tests and hangs system"
href="https://bugs.freedesktop.org/show_bug.cgi?id=62959#c33">Comment # 33</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - r600g (HD 6950 Cayman) fails piglit tests and hangs system"
href="https://bugs.freedesktop.org/show_bug.cgi?id=62959">bug 62959</a>
from <span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=62959#c32">comment #32</a>)
<span class="quote">> <span class=""><a href="attachment.cgi?id=77608" name="attach_77608" title="Always vm flush">Attachment 77608</a> <a href="attachment.cgi?id=77608&action=edit" title="Always vm flush">[details]</a></span> fixes the lockups, which suggests the DRM driver
> doesn't actually flush caches when it should.</span >
radeon_ring_vm_flush() doesn't actually flush caches per se, it writes the new
VM page table base address, so presumably we are not handling last_flush
properly somewhere which results in a stale VM page table pointer.</pre>
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