diff options
| author | Mel Gorman <mel@csn.ul.ie> | 2009-06-16 15:31:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:32 -0700 |
| commit | 6484eb3e2a81807722c5f28efef94d8338b7b996 (patch) | |
| tree | 10ce36f412c2ff0c7eb399af1a189f8e354f56db /drivers/misc/sgi-gru/grufile.c | |
| parent | b3c466ce512923298ae8c0121d3e9f397a3f1210 (diff) | |
page allocator: do not check NUMA node ID when the caller knows the node is valid
Callers of alloc_pages_node() can optionally specify -1 as a node to mean
"allocate from the current node". However, a number of the callers in
fast paths know for a fact their node is valid. To avoid a comparison and
branch, this patch adds alloc_pages_exact_node() that only checks the nid
with VM_BUG_ON(). Callers that know their node is valid are then
converted.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Paul Mundt <lethal@linux-sh.org> [for the SLOB NUMA bits]
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grufile.c')
| -rw-r--r-- | drivers/misc/sgi-gru/grufile.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c index bbefe77c67a..3ce2920e2bf 100644 --- a/drivers/misc/sgi-gru/grufile.c +++ b/drivers/misc/sgi-gru/grufile.c @@ -302,7 +302,7 @@ static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr) pnode = uv_node_to_pnode(nid); if (bid < 0 || gru_base[bid]) continue; - page = alloc_pages_node(nid, GFP_KERNEL, order); + page = alloc_pages_exact_node(nid, GFP_KERNEL, order); if (!page) goto fail; gru_base[bid] = page_address(page); |