Re: [PATCH] drm/ttm: fix delayed ttm_bo_cleanup_refs_and_unlock delayed handling

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On Tue, Jan 15, 2013 at 12:03 PM, Markus Trippelsdorf
<markus@xxxxxxxxxxxxxxx> wrote:
> On 2013.01.15 at 17:32 +0100, Markus Trippelsdorf wrote:
>> On 2013.01.15 at 16:26 +0100, Michel Dänzer wrote:
>> > On Die, 2013-01-15 at 16:23 +0100, Markus Trippelsdorf wrote:
>> > > On 2013.01.15 at 15:43 +0100, Michel Dänzer wrote:
>> > > > On Sam, 2013-01-05 at 11:41 +0100, Markus Trippelsdorf wrote:
>> > > > > On 2012.12.20 at 14:58 +0100, Markus Trippelsdorf wrote:
>> > > > > >
>> > > > > > And just in case it got lost in the noise yesterday:
>> > > > > > The image corruption is caused by Dave's commit:
>> > > > > >
>> > > > > > commit dd54fee7d440c4a9756cce2c24a50c15e4c17ccb
>> > > > > > Author: Dave Airlie <airlied@xxxxxxxxxx>
>> > > > > > Date:   Fri Dec 14 21:04:46 2012 +1000
>> > > > > >
>> > > > > >     radeon: fix regression with eviction since evict caching changes
>> > > > > >
>> > > > > > Reverting it 'fixes' the issue.
>> > > > >
>> > > > > Ping.
>> > > > > The issue still happens with todays Linus git tree.
>> > > >
>> > > > Does the corruption also occur with
>> > > > dd54fee7d440c4a9756cce2c24a50c15e4c17ccb applied manually on top of
>> > > > 0d0b3e7443bed6b49cb90fe7ddc4b5578a83a88d?
>> > >
>> > > No.
>> >
>> > So, can you bisect which change between those two actually introduced
>> > the corruption?
>>
>> 86a1881d08f65a42c17071a59c0088dbe2870246 is the first bad commit
>
> Sorry, the bisection above was wrong. Please ignore.
>
> The real cause of the image corruption is:
>
> d025e9e2b890db679f1246037bf65bd4be512627 is the first bad commit
> commit d025e9e2b890db679f1246037bf65bd4be512627
> Author: Jerome Glisse <jglisse@xxxxxxxxxx>
> Date:   Thu Nov 29 10:35:41 2012 -0500
>
>     drm/radeon: do not move bo to different placement at each cs
>
>     The bo creation placement is where the bo will be. Instead of trying
>     to move bo at each command stream let this work to another worker
>     thread that will use more advance heuristic.
>
>     agd5f: remove leftover unused variable
>
>     Signed-off-by: Jerome Glisse <jglisse@xxxxxxxxxx>
>     Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
>
> Reverting d025e9e2b890d on top of Linus' tree fixes the issue.

Can you try this patch from Jerome:
https://bugzilla.kernel.org/attachment.cgi?id=91421

Alex
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