On Mon, Mar 09, 2015 at 02:34:46AM +0000, Zou, Nanhai wrote: > We don't need MAP_FIXED, we just want to avoid address 0 to be allocated. > > Though I think using MAP_FIXED is overkill, will bring much unnecessary > complexity on both kernel and beignet side. > I don't mind if people can provide stable MAP_FIXED patches to resolve this > problem a few months or years later. > > At that time, kernel driver can revert the reserve page 0 patch. > Before that reserve page 0 can benefit all the Beignet user without breaking > anything.
The point is that is becomes ABI. So no the kernel can't just revert it. There is nothing special about address 0 in ether GTT or virtual memory. If you require a special object allocated at address 0, allocate a special object at address 0. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
