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sparc64: Trim page tables for 8M hugepages
authorNitin Gupta <nitin.m.gupta@oracle.com>
Fri, 29 Jul 2016 07:54:21 +0000 (00:54 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 29 Jul 2016 17:49:16 +0000 (10:49 -0700)
commit7bc3777ca19cf9ecc5533980210f29c51df7fe5e
treebaaa60bd0a6dfe46a902d7e151005b013f340e7ftree | snapshot (tar.gz zip)
parentaf1b1a9b36b8f9d583d4b4f90dd8946ed0cd4bd0commit | diff
sparc64: Trim page tables for 8M hugepages

For PMD aligned (8M) hugepages, we currently allocate
all four page table levels which is wasteful. We now
allocate till PMD level only which saves memory usage
from page tables.

Also, when freeing page table for 8M hugepage backed region,
make sure we don't try to access non-existent PTE level.

Orabug: 22630259

Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
arch/sparc/include/asm/hugetlb.h diff | blob | blame | history
arch/sparc/include/asm/pgtable_64.h diff | blob | blame | history
arch/sparc/include/asm/tsb.h diff | blob | blame | history
arch/sparc/mm/fault_64.c diff | blob | blame | history
arch/sparc/mm/hugetlbpage.c diff | blob | blame | history
arch/sparc/mm/init_64.c diff | blob | blame | history