[PATCH 4/6] change alloc function in vmemmap_alloc_block
in [Kernel]
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From: Minchan Kim on 13 Apr 2010 11:30 if node_state is N_HIGH_MEMORY, node doesn't have -1. It means node's validity check is unnecessary. So we can use alloc_pages_exact_node instead of alloc_pages_node. It could avoid comparison and branch as 6484eb3e2a81807722 tried. Cc: Christoph Lameter <cl(a)linux-foundation.org> Signed-off-by: Minchan Kim <minchan.kim(a)gmail.com> --- mm/sparse-vmemmap.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index 392b9bb..7710ebc 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -53,7 +53,7 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node) struct page *page; if (node_state(node, N_HIGH_MEMORY)) - page = alloc_pages_node(node, + page = alloc_pages_exact_node(node, GFP_KERNEL | __GFP_ZERO, get_order(size)); else page = alloc_pages(GFP_KERNEL | __GFP_ZERO, -- 1.7.0.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |