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Muchun Song
e9fdff87e8
Add a kernel parameter hugetlb_free_vmemmap to enable the feature of freeing unused vmemmap pages associated with each hugetlb page on boot. We disable PMD mapping of vmemmap pages for x86-64 arch when this feature is enabled. Because vmemmap_remap_free() depends on vmemmap being base page mapped. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Muchun Song <[email protected]> Reviewed-by: Oscar Salvador <[email protected]> Reviewed-by: Barry Song <[email protected]> Reviewed-by: Miaohe Lin <[email protected]> Tested-by: Chen Huang <[email protected]> Tested-by: Bodeddula Balasubramaniam <[email protected]> Reviewed-by: Mike Kravetz <[email protected]> Cc: Alexander Viro <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Anshuman Khandual <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: David Rientjes <[email protected]> Cc: HORIGUCHI NAOYA <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Joao Martins <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mina Almasry <[email protected]> Cc: Oliver Neukum <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Pawan Gupta <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Xiongchun Duan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
