Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [PATCH 4/4] zsmalloc: zsmalloc: align cache line size | Date | Thu, 3 May 2012 15:40:42 +0900 |
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It's a overkill to align pool size with PAGE_SIZE to avoid false-sharing. This patch aligns it with just cache line size.
Signed-off-by: Minchan Kim <minchan@kernel.org> --- drivers/staging/zsmalloc/zsmalloc-main.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c index 51074fa..3991b03 100644 --- a/drivers/staging/zsmalloc/zsmalloc-main.c +++ b/drivers/staging/zsmalloc/zsmalloc-main.c @@ -489,14 +489,14 @@ fail: struct zs_pool *zs_create_pool(const char *name, gfp_t flags) { - int i, error, ovhd_size; + int i, error; struct zs_pool *pool; if (!name) return NULL; - ovhd_size = roundup(sizeof(*pool), PAGE_SIZE); - pool = kzalloc(ovhd_size, GFP_KERNEL); + pool = kzalloc(ALIGN(sizeof(*pool), cache_line_size()), + GFP_KERNEL); if (!pool) return NULL; -- 1.7.9.5
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