On Maw, 2005-08-23 at 20:45 +0300, Ville Syrjälä wrote: > Is there any way to make that work without going to the kernel for each > allocation? Personally I'd like to have the protection even if it > degrades performance slightly.
X allows applications to read the displayed video memory anyway so what is the big deal here ? You can do memory protection outside of command streams pretty cheaply. If the DRM kernel modules controls which blocks of video ram are mapped into which task then you get memory protection. You will need some kind of reclaim handler to steal memory from other tasks and revoke their pages. That *is* expensive especialy on SMP. ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
