On 11/06/2017 09:35 PM, Pavel Tatashin wrote: > From: Will Deacon <will.deacon@xxxxxxx> > > The kasan shadow is currently mapped using vmemmap_populate() since that > provides a semi-convenient way to map pages into init_top_pgt. However, > since that no longer zeroes the mapped pages, it is not suitable for kasan, > which requires zeroed shadow memory. > > Add kasan_populate_shadow() interface and use it instead of > vmemmap_populate(). Besides, this allows us to take advantage of gigantic > pages and use them to populate the shadow, which should save us some memory > wasted on page tables and reduce TLB pressure. > > Signed-off-by: Will Deacon <will.deacon@xxxxxxx> > Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> > --- Acked-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
