[PATCH xserver (v3) 00/10] X Server support for Fence Sync

[Keith Packard]

On Sun, 5 Dec 2010 19:25:25 -0800, James Jones <jajones at nvidia.com> wrote:

> Now without damage changes.
> 
> Implements X Sync Fence Objects in the server, including
> the damage 1.2 support for DamageSubtractAndTrigger.  Re-
> uses X Sync Counter code wherever possible.  A driver
> interface has also been added so DDX drivers can redirect
> fence sync operations to HW rendering backend operations.
> 

Some patch-sequencing suggestions:

 * Do all of the API rework *before* adding the
   new data type. So, the work to add the SyncObject
   base type should be done first.

 * Moving code to miext is part of this rework.

 * Add all of the request processing code for all of the
   new requests before adding the dispatching hooks
   to get at this. This will allow people to bisect
   through the patch without exposing a broken version
   of the extension to applications

 * Finally, update the reported extension version and
   hook up the dispatch vectors.

Take a look at how I added the RandR 1.4 functionality in that patch
sequence. It's not perfect, and could use some more re-sequencing, but
it's at least usable at each point.

The main thing is to isolate the rework needed to implement the new
functionality from the new functionality itself. We also don't need to
see intermediate bug fixes and reworking of the code. The goal is not to
present the actual sequence of development, but to provide patches that
are as easy to review as possible.

The finished code looks quite good though, I'd rather see if you can't
clean up the individual patches before I start wading through a review
pass.

-- 
keith.packard at intel.com
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