On Thu, Jun 18, 2020 at 06:45:30AM +0530, Anshuman Khandual wrote: > Device memory ranges when getting hot added into ZONE_DEVICE, might require > their vmemmap mapping's backing memory to be allocated from their own range > instead of consuming system memory. This prevents large system memory usage > for potentially large device memory ranges. Device driver communicates this > request via vmem_altmap structure. Architecture needs to take this request > into account while creating and tearing down vemmmap mappings. > > This enables vmem_altmap support in vmemmap_populate() and vmemmap_free() > which includes vmemmap_populate_basepages() used for ARM64_16K_PAGES and > ARM64_64K_PAGES configs. > > Cc: Catalin Marinas <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Mark Rutland <[email protected]> > Cc: Steve Capper <[email protected]> > Cc: David Hildenbrand <[email protected]> > Cc: Yu Zhao <[email protected]> > Cc: Hsin-Yi Wang <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: [email protected] > Cc: [email protected] > Tested-by: Jia He <[email protected]> > Signed-off-by: Anshuman Khandual <[email protected]>
This looks fine to me: Reviewed-by: Catalin Marinas <[email protected]> I presume this series would go into mainline via the mm tree as it touches several architectures.
