On Wed, Oct 14, 2020 at 05:51:23PM -0700, Sudarshan Rajagopalan wrote: > When section mappings are enabled, we allocate vmemmap pages from > physically continuous memory of size PMD_SIZE using > vmemmap_alloc_block_buf(). Section mappings are good to reduce TLB > pressure. But when system is highly fragmented and memory blocks are > being hot-added at runtime, its possible that such physically continuous > memory allocations can fail. Rather than failing the memory hot-add > procedure, add a fallback option to allocate vmemmap pages from > discontinuous pages using vmemmap_populate_basepages(). > > Signed-off-by: Sudarshan Rajagopalan <[email protected]> > Reviewed-by: Gavin Shan <[email protected]> > Reviewed-by: Anshuman Khandual <[email protected]> > Cc: Catalin Marinas <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Anshuman Khandual <[email protected]> > Cc: Mark Rutland <[email protected]> > Cc: Logan Gunthorpe <[email protected]> > Cc: David Hildenbrand <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: Steven Price <[email protected]> > --- > arch/arm64/mm/mmu.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-)
Please can you fix the subject? I have three copies of "PATCH v3" from different days in my inbox. I know it sounds trivial, but getting these little things right really helps with review, especially when it's sitting amongst a sea of other patches. Thanks, Will
