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mm: cma: use pr_err_ratelimited for CMA warning

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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/ce2251ef49e1727a9a40531d1996660b05462bd2.1615279825.git.baolin.wang@linux.alibaba.com
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>
This commit is contained in:
Baolin Wang 2021-05-04 18:37:22 -07:00 committed by Linus Torvalds
parent bbb269206f
commit 63f83b31f4
1 changed files with 2 additions and 2 deletions
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4
mm/cma.c
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@ -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);
}