The patch titled
Subject: mm: alloc_contig_range: demote pages busy message from warn to info
has been added to the -mm tree. Its filename is
mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info.patch
echo and later at
echo http://ozlabs.org/~akpm/mmotm/broken-out/mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info.patch
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From: Michal Nazarewicz <mina86@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff -puN mm/page_alloc.c~mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info mm/page_alloc.c
--- a/mm/page_alloc.c~mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info
+++ a/mm/page_alloc.c
@@ -6397,13 +6397,12 @@ int alloc_contig_range(unsigned long sta
/* Make sure the range is really isolated. */
if (test_pages_isolated(outer_start, end, false)) {
- pr_warn("alloc_contig_range test_pages_isolated(%lx, %lx) failed\n",
- outer_start, end);
+ pr_info("%s: [%lx, %lx) PFNs busy\n",
+ __func__, outer_start, end);
ret = -EBUSY;
goto done;
}
-
/* Grab isolated pages from freelists. */
outer_end = isolate_freepages_range(&cc, outer_start, end);
if (!outer_end) {
_
Patches currently in -mm which might be from mina86@xxxxxxxxxx are
origin.patch
mm-compaction-skip-the-range-until-proper-target-pageblock-is-met.patch
mm-page_alloc-fix-incorrect-isolation-behavior-by-rechecking-migratetype.patch
mm-page_alloc-add-freepage-on-isolate-pageblock-to-correct-buddy-list.patch
mm-page_alloc-move-freepage-counting-logic-to-__free_one_page.patch
mm-page_alloc-restrict-max-order-of-merging-on-isolated-pageblock.patch
mm-alloc_contig_range-demote-pages-busy-message-from-warn-to-info.patch
mm-introduce-single-zone-pcplists-drain.patch
mm-page_isolation-drain-single-zone-pcplists.patch
mm-cma-drain-single-zone-pcplists.patch
mm-memory_hotplug-failure-drain-single-zone-pcplists.patch
mm-compaction-pass-classzone_idx-and-alloc_flags-to-watermark-checking.patch
mm-compaction-simplify-deferred-compaction.patch
mm-compaction-defer-only-on-compact_complete.patch
mm-compaction-always-update-cached-scanner-positions.patch
mm-compaction-more-focused-lru-and-pcplists-draining.patch
linux-next.patch
mm-cma-make-kmemleak-ignore-cma-regions.patch
mm-cma-split-cma-reserved-in-dmesg-log.patch
fs-proc-include-cma-info-in-proc-meminfo.patch
debugging-keep-track-of-page-owners.patch
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