On Tue, Nov 08, 2016 at 03:54:47PM +0900, Gustavo Padovan wrote: > From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx> > > Hi, > > This is yet another version of the DRM fences patches. Please refer > to the cover letter[1] in a previous version to check for more details. Explicit fencing is not a superset of the implicit fences. The driver may be using implicit fences (on a reservation object) to serialise asynchronous operations wrt to each other (such as dispatching threads to flush cpu caches to memory, manipulating page tables and the like before the flip). Since the user doesn't know about these operations, they are not included in the explicit fence they provide, at which point we can't trust their fence to the exclusion of the implicit fences... -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
