On Iau, 2005-11-24 at 05:49 -0500, Lee Revell wrote: > BTW can you point me to a good explanation of DRM locking? There's so > much indirection in the DRM code I can't even tell whether there's one > DRM lock or several, what kind of lock it is or what it's protecting > (beyond "access to the hardware"). Is it just an advisory lock used by > DRM clients to keep from stepping on each other? It doesn't seem > related to spinlocks or mutexes or any of the other types of lock in the > kernel.
It co-ordinates access between the X server and various 3D clients so that they don't step on each others drawing. A shared memory area is used to co-ordinate other things like clip lists and what context may have been stomped by another user if when you retake the lock you were not last holder. Precisely what it protects is board dependant ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
