mm: alloc_contig_range: demote pages busy message from warn to info
Having test_pages_isolated failure message as a warning confuses users into thinking that it is more serious than it really is. In reality, if called via CMA, allocation will be retried so a single test_pages_isolated failure does not prevent allocation from succeeding. Demote the warning message to an info message and reformat it such that the text "failed" does not appear and instead a less worrying "PFNS busy" is used. This message is trivially reproducible on a 10GB x86 machine on 3.16.y kernels configured with CONFIG_DMA_CMA. Signed-off-by: Michal Nazarewicz <mina86@mina86.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -6397,13 +6397,12 @@ int alloc_contig_range(unsigned long start, unsigned long end,
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/* Make sure the range is really isolated. */
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if (test_pages_isolated(outer_start, end, false)) {
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pr_warn("alloc_contig_range test_pages_isolated(%lx, %lx) failed\n",
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outer_start, end);
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pr_info("%s: [%lx, %lx) PFNs busy\n",
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__func__, outer_start, end);
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ret = -EBUSY;
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goto done;
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}
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/* Grab isolated pages from freelists. */
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outer_end = isolate_freepages_range(&cc, outer_start, end);
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if (!outer_end) {
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