From 63f83b31f4f36d933e13bd8b9a25d6d9a0cf89dd Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Tue, 4 May 2021 18:37:22 -0700 Subject: [PATCH] mm: cma: use pr_err_ratelimited for CMA warning If we did not reserve extra CMA memory, the log buffer can be easily filled up by CMA failure warning when the devices calling dmam_alloc_coherent() to alloc DMA memory. Thus we can use pr_err_ratelimited() instead to reduce the duplicate CMA warning. Link: https://lkml.kernel.org/r/ce2251ef49e1727a9a40531d1996660b05462bd2.1615279825.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang Reviewed-by: David Hildenbrand Acked-by: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/cma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/cma.c b/mm/cma.c index b44a71eb3174..a862ff8c23ce 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -500,8 +500,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, } if (ret && !no_warn) { - pr_err("%s: %s: alloc failed, req-size: %zu pages, ret: %d\n", - __func__, cma->name, count, ret); + pr_err_ratelimited("%s: %s: alloc failed, req-size: %zu pages, ret: %d\n", + __func__, cma->name, count, ret); cma_debug_show_areas(cma); }