On 6 June 2018 at 07:27, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > As we were only supporting aliasing_ppgtt on gen7 for some time, we > saved a few checks by preallocating the page directories on creation. > However, since we need 2MiB of page directories for each ppgtt, to > support arbitrary numbers of user contexts, we need to be more prudent > in our allocations, and defer the page allocation until it is used. We > don't recover unused pages yet as we found that doing so on the fly > (i.e. altering TLB entries) would confuse the GPU. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> > Cc: Matthew Auld <matthew.william.auld@xxxxxxxxx> Reviewed-by: Matthew Auld <matthew.william.auld@xxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
