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The feature of minimizing overhead of struct page associated with each HugeTLB page is implemented on x86_64, however, the infrastructure of this feature is already there, we could easily enable it for other architectures. Introduce ARCH_WANT_HUGETLB_PAGE_FREE_VMEMMAP for other architectures to be easily enabled. Just select this config if they want to enable this feature. Link: https://lkml.kernel.org/r/20220331065640.5777-1-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Barry Song <baohua@kernel.org> Tested-by: Barry Song <baohua@kernel.org> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Bodeddula Balasubramaniam <bodeddub@amazon.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Fam Zheng <fam.zheng@bytedance.com> Cc: James Morse <james.morse@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Will Deacon <will@kernel.org> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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