From: Ilija Hadzic <ihadzic@research.bell-labs.com>
To: "Christian König" <deathsimple@vodafone.de>
Cc: Alex Deucher <alexander.deucher@amd.com>,
dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 1/3] drm/radeon: Disable dma rings for bo moves on r6xx
Date: Fri, 12 Jul 2013 09:23:20 -0500 (CDT) [thread overview]
Message-ID: <Pine.GSO.4.64.1307120915460.13795@umail> (raw)
In-Reply-To: <51DFA7E9.2050102@vodafone.de>
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On Fri, 12 Jul 2013, Christian König wrote:
> Hi Ilija,
>
> well that's very interesting and no it's quite unlikely that this is cause by
> the DMA ring because the radeon_sa_bo structure should be allocated on system
> memory and the GPU can usually only access it if you map it through GART.
>
OK that's good information to know. I'll do some more investigation on my
end.
> Is that easily reproducible for you? Is there already an open bugreport?
>
It typically happens out of the blue after several days of running, but
it happens consistently (just like padding the radeon_sa_bo structure
consistently suppresses the problem).
However, like I said, my kernel is full of my own patches that don't live
in the upstream tree, so I am not excluding the possibility that one of my
hacks introduced the problem (though, I find it unlikely).
I have not yet opened the bug report, because I first want to reproduce
the problem with the upstream kernel that is free of my hacks. As soon as
I do that, I'll write the ticket.
-- Ilija
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next prev parent reply other threads:[~2013-07-12 14:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-11 19:35 [PATCH 1/3] drm/radeon: Disable dma rings for bo moves on r6xx alexdeucher
2013-07-11 19:35 ` [PATCH 2/3] drm/radeon: implement bo copy callback using CP DMA (v2) alexdeucher
2013-07-18 12:29 ` Marek Olšák
2013-07-11 19:35 ` [PATCH 3/3] drm/radeon: use CP DMA on r6xx for bo moves alexdeucher
2013-07-11 19:59 ` [PATCH 1/3] drm/radeon: Disable dma rings for bo moves on r6xx Ilija Hadzic
2013-07-11 20:05 ` Alex Deucher
2013-07-12 6:53 ` Christian König
2013-07-12 14:23 ` Ilija Hadzic [this message]
2013-07-12 6:50 ` Christian König
2013-07-12 13:04 ` Alex Deucher
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