[PATCH xserver 3/3] present: Only requeue if target MSC is not reached after an unflip

[Martin Peres]

On 25/02/16 17:28, Adam Jackson wrote:
> On Thu, 2016-02-25 at 09:49 +0000, Chris Wilson wrote:
>> On Wed, Feb 24, 2016 at 04:52:59PM +0900, Michel Dänzer wrote:
>>> From: Michel Dänzer <michel.daenzer at amd.com>
>>>
>>> While present_pixmap decrements target_msc by 1 for present_queue_vblank,
>>> it leaves the original vblank->target_msc intact. So incrementing the
>>> latter for requeueing resulted in the requeued presentation being
>>> executed too late.
>> My mistake. Yes, the local target_msc is decremented but after
>> vblank->target_msc is assigned.
>>   
>>> Also, no need to requeue if the target MSC is already reached.
>>>
>>> This further reduces stutter when a popup menu appears on top of a
>>> flipping fullscreen window.
>>>
>>> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
>> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
>> -Chris
> Series merged:
>
> remote: I: patch #74919 updated using rev 1a9f8c4623c4e6b6955cb6d5f44d29c244dfd32a.
> remote: I: patch #74915 updated using rev e7a35b9e16aa12970908f5d55371bb1b862f8f24.
> remote: I: patch #74910 updated using rev b4ac7b142fa3c536e9b283cfd34b94d82c03aac6.
> remote: I: 3 patch(es) updated to state Accepted.
> To ssh://git.freedesktop.org/git/xorg/xserver
>     0461bca..b4ac7b1  master -> master
>

For some reason, this patch prevents kde from starting. I will provide 
an xtrace for this as soon as I can, but I wanted to provide you with a 
heads'up!