On 10/28/2013 4:42 AM, zhang.ming...@linaro.org wrote:
From: Mingjun Zhang <troy.zhangming...@linaro.org>free_contig_range frees cma pages one by one and MIGRATE_CMA pages will be used as MIGRATE_MOVEABLE pages in the pcp list, it causes unnecessary migration action when these pages reused by CMA. Signed-off-by: Mingjun Zhang <troy.zhangming...@linaro.org> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0ee638f..84b9d84 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1362,7 +1362,8 @@ void free_hot_cold_page(struct page *page, int cold) * excessively into the page allocator */ if (migratetype >= MIGRATE_PCPTYPES) { - if (unlikely(is_migrate_isolate(migratetype))) { + if (unlikely(is_migrate_isolate(migratetype)) + || is_migrate_cma(migratetype)) free_one_page(zone, page, 0, migratetype); goto out; }
I submitted something very similar a while ago http://marc.info/?l=linaro-mm-sig&m=137645764208287&w=2 . Has the opinion on this patch changed?
Thanks, Laura -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
