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 <sudar...@codeaurora.org> > Reviewed-by: Gavin Shan <gs...@redhat.com> > Reviewed-by: Anshuman Khandual <anshuman.khand...@arm.com> > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: Will Deacon <w...@kernel.org> > Cc: Anshuman Khandual <anshuman.khand...@arm.com> > Cc: Mark Rutland <mark.rutl...@arm.com> > Cc: Logan Gunthorpe <log...@deltatee.com> > Cc: David Hildenbrand <da...@redhat.com> > Cc: Andrew Morton <a...@linux-foundation.org> > Cc: Steven Price <steven.pr...@arm.com> > --- > 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
