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authorJan Beulich <JBeulich@novell.com>2009-09-21 17:03:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:38 -0700
commit2c85f51d222ccdd8c401d77a36b723a89156810d (patch)
treefb94c6ea243504043e434f0a7d26cfd4831b33a9 /mm/page_alloc.c
parent3c1596efe167322dae87f8390d36f91ce2d7f936 (diff)
downloadconfigs-2c85f51d222ccdd8c401d77a36b723a89156810d.tar.gz
mm: also use alloc_large_system_hash() for the PID hash table
This is being done by allowing boot time allocations to specify that they may want a sub-page sized amount of memory. Overall this seems more consistent with the other hash table allocations, and allows making two supposedly mm-only variables really mm-only (nr_{kernel,all}_pages). Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 33b1a4762a7..770f011e1c1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -124,8 +124,8 @@ static char * const zone_names[MAX_NR_ZONES] = {
int min_free_kbytes = 1024;
-unsigned long __meminitdata nr_kernel_pages;
-unsigned long __meminitdata nr_all_pages;
+static unsigned long __meminitdata nr_kernel_pages;
+static unsigned long __meminitdata nr_all_pages;
static unsigned long __meminitdata dma_reserve;
#ifdef CONFIG_ARCH_POPULATES_NODE_MAP
@@ -4821,7 +4821,14 @@ void *__init alloc_large_system_hash(const char *tablename,
numentries <<= (PAGE_SHIFT - scale);
/* Make sure we've got at least a 0-order allocation.. */
- if (unlikely((numentries * bucketsize) < PAGE_SIZE))
+ if (unlikely(flags & HASH_SMALL)) {
+ /* Makes no sense without HASH_EARLY */
+ WARN_ON(!(flags & HASH_EARLY));
+ if (!(numentries >> *_hash_shift)) {
+ numentries = 1UL << *_hash_shift;
+ BUG_ON(!numentries);
+ }
+ } else if (unlikely((numentries * bucketsize) < PAGE_SIZE))
numentries = PAGE_SIZE / bucketsize;
}
numentries = roundup_pow_of_two(numentries);