On Mon, Feb 06, 2017 at 10:36:16PM +0530, Aneesh Kumar K.V wrote: > Architectures like ppc64, use privilege access bit to mark pte non accessible. > This implies that kernel can do a copy_to_user to an address marked for numa > fault. > This also implies that there can be a parallel hardware update for the pte. > set_pte_at cannot be used in such scenarios. Hence switch the pte > update to use ptep_get_and_clear and set_pte_at combination. > > Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
Yeah, ok. The main thing is that it still avoids doing an unnecessary TLB flush so Acked-by: Mel Gorman <mgor...@techsingularity.net> -- Mel Gorman SUSE Labs
