From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755182Ab3EZUpS (ORCPT ); Sun, 26 May 2013 16:45:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56374 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754807Ab3EZUpQ (ORCPT ); Sun, 26 May 2013 16:45:16 -0400 From: atomlin@redhat.com To: netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, pshelar@nicira.com, mst@redhat.com, alexander.h.duyck@intel.com, riel@redhat.com, aquini@redhat.com, sergei.shtylyov@cogentembedded.com, linux-kernel@vger.kernel.org, Aaron Tomlin Subject: [Patch v2] skbuff: Hide GFP_ATOMIC page allocation failures for dropped packets Date: Sun, 26 May 2013 21:45:01 +0100 Message-Id: <1369601101-23057-1-git-send-email-atomlin@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Aaron Tomlin Since v1: - Removed unnecessary parentheses (sergei.shtylyov) ---8<--- Failed GFP_ATOMIC allocations by the network stack result in dropped packets, which will be received on a subsequent retransmit, and an unnecessary, noisy warning with a kernel backtrace. These warnings are harmless, but they still cause users to panic and file bug reports over dropped packets. It would be better to hide the failed allocation warnings and backtraces, and let retransmits handle dropped packets quietly. Signed-off-by: Aaron Tomlin --- net/core/skbuff.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index af9185d..84aa870 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -236,7 +236,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, ? skbuff_fclone_cache : skbuff_head_cache; if (sk_memalloc_socks() && (flags & SKB_ALLOC_RX)) - gfp_mask |= __GFP_MEMALLOC; + gfp_mask |= __GFP_MEMALLOC | __GFP_NOWARN; /* Get the HEAD */ skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node); -- 1.8.1.4