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

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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.

-- 
Markus
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