On to, 2017-04-20 at 11:17 +0100, Chris Wilson wrote: > The contents of a ring are only valid between HEAD and TAIL, when the > ring is idle (HEAD == TAIL) we can simply let the pages go under memory > pressue if they are not pinned by an active context. And new content > will be written and so the ring will again be valid between HEAD and > TAIL, everything outside can be discarded. > > Note that we take care of ensuring that we do not reset the HEAD > backwards following a GPU hang on an idle ring. > > The same precautions are what enable us to use stolen memory for rings. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Regards, Joonas -- Joonas Lahtinen Open Source Technology Center Intel Corporation _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
