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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Random crashes on RadeonSI with Chromium."
href="https://bugs.freedesktop.org/show_bug.cgi?id=81644#c127">Comment # 127</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Random crashes on RadeonSI with Chromium."
href="https://bugs.freedesktop.org/show_bug.cgi?id=81644">bug 81644</a>
from <span class="vcard"><a class="email" href="mailto:alexandre.f.demers@gmail.com" title="Alexandre Demers <alexandre.f.demers@gmail.com>"> <span class="fn">Alexandre Demers</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=81644#c126">comment #126</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=81644#c119">comment #119</a>)
> > Small question Alex Deucher or Christian may answer: is it normal ring 5 is
> > completely in a different GPU's memory address area?
> > [ 9.353518] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
> > 0x00000000c0000c00 and cpu addr 0xffff880411a25c00
> > [ 9.353519] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr
> > 0x00000000c0000c04 and cpu addr 0xffff880411a25c04
> > [ 9.353521] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr
> > 0x00000000c0000c08 and cpu addr 0xffff880411a25c08
> > [ 9.353522] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr
> > 0x00000000c0000c0c and cpu addr 0xffff880411a25c0c
> > [ 9.353524] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr
> > 0x00000000c0000c10 and cpu addr 0xffff880411a25c10
> > [ 9.356425] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr
> > 0x0000000000075a18 and cpu addr 0xffffc90015fb5a18
> >
> > rings 0 to 4 are all in the same gpu address subset, but not ring 5?
>
> Yes that's perfectly normal. Ring 5 is the UVD ring and that needs to have
> it's fence in the first 256MB of VRAM.</span >
Thank you Christian for your quick explanation. Can we suspect the problem to
be withing the UVD code then if:
- crashes are mostly happening when watching videos (flash or html5 in whatever
browser);
- logs points to ring 5 not responding for some time?</pre>
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