On 5/4/07, Thomas Hellström <[EMAIL PROTECTED]> wrote: > I was actually referring to an example where two clients need to have a > buffer mapped and access it at exactly the same time. > If there is such a situation, we have no other choice than to drop the > buffer locking on map. If there isn't we can at least consider other > alternatives that resolve the deadlock issue but that also will help > clients synchronize and keep data coherent. > > /Thomas
One might be a texture where a portion is updated by one thread and another portion update by another one, i believe the application will know better than us if such concurrent access will conflict or not. If this both thread access different pixel it make sense to let them work together at the same time on the texture. If they are writing to same pixel then they will have to sync between them so they don't do somethings stupid. My point is that the user space will know better if sync is needed or not and how to sync access to the same buffer. Moreover we can still add a locking mechanism in user space (in libdrm for instance). There is very likely others use case for such concurrent access which i can't think off right now. best, Jerome Glisse ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
