From: Baolin Wang baolin.wang@linux.alibaba.com
mainline inclusion from mainline-v5.13 commit 63f83b31f4f36d933e13bd8b9a25d6d9a0cf89dd category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I63SDZ CVE: NA
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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/ce2251ef49e1727a9a40531d1996660b05462bd2.161527982... Signed-off-by: Baolin Wang baolin.wang@linux.alibaba.com Reviewed-by: David Hildenbrand david@redhat.com Acked-by: Minchan Kim minchan@kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org --- mm/cma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/cma.c b/mm/cma.c index 9361ecaf52be..09f3b1e264c0 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -486,8 +486,8 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, }
if (ret && !no_warn) { - pr_err("%s: alloc failed, req-size: %zu pages, ret: %d\n", - __func__, count, ret); + pr_err_ratelimited("%s: alloc failed, req-size: %zu pages, ret: %d\n", + __func__, count, ret); cma_debug_show_areas(cma); }