On 2020-10-15 01:36, Will Deacon wrote:
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.
Yes sure, sorry about that - will change it to "PATCH v4" to make it
stand out from other patches.
Thanks,
Will
Sudarshan
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