[rh7] sctp: suppress warnings on high order memory allocation on sctp chunk creation

Submitted by Konstantin Khorenko on Oct. 31, 2019, 10:08 a.m.

Details

Message ID 20191031100834.16101-1-khorenko@virtuozzo.com
State New
Series "sctp: suppress warnings on high order memory allocation on sctp chunk creation"
Headers show

Commit Message

Konstantin Khorenko Oct. 31, 2019, 10:08 a.m. 
_sctp_make_chunk() could allocate skbs up to 65K in size
(4th order page), so we get complains about high order page
allocations from our detection mechanizm while running sctp
testsuite.

It's not evident that substituting alloc_skb() with
alloc_skb_with_frags() speeds up the sender performance.
On another hand if the node's memory is highly fragmented
and allocation of high order pages has noticable latency,
it influences the sender most, not the node as a whole.

And taking into account that sctp is not widely used,
let's just shut up the warning in this place.

https://jira.sw.ru/browse/PSBM-93798

Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
---
 net/sctp/sm_make_chunk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch hide | download patch | download mbox 

diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 8fef389dd2fa..4611e85ace9f 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1408,7 +1408,7 @@  static struct sctp_chunk *_sctp_make_chunk(const struct sctp_association *asoc,
 		goto nodata;
 
 	/* No need to allocate LL here, as this is only a chunk. */
-	skb = alloc_skb(chunklen, gfp);
+	skb = alloc_skb(chunklen, gfp | __GFP_ORDER_NOWARN);
 	if (!skb)
 		goto nodata;