Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1702332

[PATCH] mm: ratelimit PFNs busy info message

Show all headers | View raw

The RDMA subsystem can generate several thousand of these messages per
second eventually leading to a kernel crash. Ratelimit these messages
to prevent this crash.

Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Tested-by: Doug Ledford <dledford@redhat.com>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6d30e914afb6..07b7d3060b21 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7666,7 +7666,7 @@ 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",
+		pr_info_ratelimited("%s: [%lx, %lx) PFNs busy\n",
 			__func__, outer_start, end);
 		ret = -EBUSY;
 		goto done;
-- 
2.10.2

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] mm: ratelimit PFNs busy info message Jonathan Toppins <jtoppins@redhat.com> - 2017-08-02 19:50 +0200
  Re: [PATCH] mm: ratelimit PFNs busy info message Doug Ledford <dledford@redhat.com> - 2017-08-02 20:10 +0200
  Re: [PATCH] mm: ratelimit PFNs busy info message Andrew Morton <akpm@linux-foundation.org> - 2017-08-02 23:20 +0200
    Re: [PATCH] mm: ratelimit PFNs busy info message Doug Ledford <dledford@redhat.com> - 2017-08-04 21:00 +0200
      Re: [PATCH] mm: ratelimit PFNs busy info message Michal Hocko <mhocko@kernel.org> - 2017-08-07 09:00 +0200
    Re: [PATCH] mm: ratelimit PFNs busy info message Michael Ellerman <mpe@ellerman.id.au> - 2017-08-08 07:40 +0200

csiph-web