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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - radeon - ring 0 stalled - GPU lockup - SI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107545#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - radeon - ring 0 stalled - GPU lockup - SI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107545">bug 107545</a>
from <span class="vcard"><a class="email" href="mailto:julien.isorce@gmail.com" title="Julien Isorce <julien.isorce@gmail.com>"> <span class="fn">Julien Isorce</span></a>
</span></b>
<pre>I found time to go a bit further. Now I understand this radeon_cs_parser_init
function a bit more
If I comment the AGP condition here
<a href="https://cgit.freedesktop.org/~agd5f/linux/tree/drivers/gpu/drm/radeon/radeon_cs.c?h=amd-staging-drm-next#n340">https://cgit.freedesktop.org/~agd5f/linux/tree/drivers/gpu/drm/radeon/radeon_cs.c?h=amd-staging-drm-next#n340</a>
so that kdata is used then I can verify that the kdata contains the same data
as user space.
But when writing to parser->ib.ptr here
<a href="https://cgit.freedesktop.org/~agd5f/linux/tree/drivers/gpu/drm/radeon/radeon_cs.c?h=amd-staging-drm-next#n648">https://cgit.freedesktop.org/~agd5f/linux/tree/drivers/gpu/drm/radeon/radeon_cs.c?h=amd-staging-drm-next#n648</a>
then comparing parser->ib.ptr's data and kdata shows the same difference as
pointed in <a href="show_bug.cgi?id=107545#c5">comment #5</a>.
Could it be an issue with pcie (though is works with admgpu, well in fact it
uses kdata on amdgpu) ? Is there anyway I can force a commit/flush just after
it writes to parser->ib.ptr as a test even if it is slower ? thx!</pre>
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