[PATCH] mm: Drop "PFNs busy" printk in an expected path.

From: Eric Anholt
Date: Wed Dec 28 2016 - 21:31:38 EST

For CMA allocations, we expect to occasionally hit this error path, at
which point CMA will retry. Given that, we shouldn't be spamming
dmesg about it.

The Raspberry Pi graphics driver does frequent CMA allocations, and
during regression testing this printk was sometimes occurring 100s of
times per second.

Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
mm/page_alloc.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6de9440e3ae2..bea7204c14a5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7289,8 +7289,6 @@ int alloc_contig_range(unsigned long start, unsigned long end,

/* Make sure the range is really isolated. */
if (test_pages_isolated(outer_start, end, false)) {
- pr_info("%s: [%lx, %lx) PFNs busy\n",
- __func__, outer_start, end);
ret = -EBUSY;
goto done;