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SubjectRe: [PATCH 3/6] change alloc function in alloc_slab_page
On Wed, 14 Apr 2010, Minchan Kim wrote:

> alloc_slab_page never calls alloc_pages_node with -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@linux-foundation.org>
> Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
> ---
> mm/slub.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/mm/slub.c b/mm/slub.c
> index b364844..9984165 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -1084,7 +1084,7 @@ static inline struct page *alloc_slab_page(gfp_t flags, int node,
> if (node == -1)
> return alloc_pages(flags, order);
> else
> - return alloc_pages_node(node, flags, order);
> + return alloc_pages_exact_node(node, flags, order);
> }
>
> static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)

Slub changes need to go through its maintainer, Pekka Enberg
<penberg@cs.helsinki.fi>.


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