From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758336Ab1JFMmG (ORCPT ); Thu, 6 Oct 2011 08:42:06 -0400 Received: from cantor2.suse.de ([195.135.220.15]:54576 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758310Ab1JFMmD (ORCPT ); Thu, 6 Oct 2011 08:42:03 -0400 From: Mel Gorman To: Andrew Morton Cc: Linux-MM , Linux-Netdev , LKML , David Miller , Neil Brown , Peter Zijlstra , Mel Gorman Subject: [PATCH 09/14] netvm: Propagate page->pfmemalloc to skb Date: Thu, 6 Oct 2011 13:41:45 +0100 Message-Id: <1317904910-14095-10-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1317904910-14095-1-git-send-email-mgorman@suse.de> References: <1317904910-14095-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The skb->pfmemalloc flag gets set to true iff during the slab allocation of data in __alloc_skb that the the PFMEMALLOC reserves were used. If the packet is fragmented, it is possible that pages will be allocated from the PFMEMALLOC reserve without propagating this information to the skb. This patch propagates page->pfmemalloc from pages allocated for fragments to the skb. Signed-off-by: Mel Gorman --- include/linux/skbuff.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 639a372..c7da15f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1142,6 +1142,8 @@ static inline void skb_fill_page_desc(struct sk_buff *skb, int i, { skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + if (page->pfmemalloc) + skb->pfmemalloc = true; frag->page = page; frag->page_offset = off; frag->size = size; -- 1.7.3.4