diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-04-28 09:37:29 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-04-30 05:59:53 (GMT) |
| commit | cf9427b85e90bb1ff90e2397ff419691d983c68b (patch) | |
| tree | 023cfcfe1875f79398dfa6028e23a245140d60dc /arch/powerpc/mm/init_64.c | |
| parent | 0e5f35d0e4a8179cdfac115023f418126419e659 (diff) | |
| download | linux-cf9427b85e90bb1ff90e2397ff419691d983c68b.tar.xz | |
powerpc: New hugepage directory format
Change the hugepage directory format so that we can have leaf ptes directly
at page directory avoiding the allocation of hugepage directory.
With the new table format we have 3 cases for pgds and pmds:
(1) invalid (all zeroes)
(2) pointer to next table, as normal; bottom 6 bits == 0
(4) hugepd pointer, bottom two bits == 00, next 4 bits indicate size of table
Instead of storing shift value in hugepd pointer we use mmu_psize_def index
so that we can fit all the supported hugepage size in 4 bits
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/init_64.c')
| -rw-r--r-- | arch/powerpc/mm/init_64.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 7e2246f..a56de85 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -129,8 +129,7 @@ void pgtable_cache_add(unsigned shift, void (*ctor)(void *)) align = max_t(unsigned long, align, minalign); name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift); new = kmem_cache_create(name, table_size, align, 0, ctor); - PGT_CACHE(shift) = new; - + pgtable_cache[shift - 1] = new; pr_debug("Allocated pgtable cache for order %d\n", shift); } |