Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757202Ab1FIIEs (ORCPT ); Thu, 9 Jun 2011 04:04:48 -0400 Received: from cantor2.suse.de ([195.135.220.15]:59205 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756839Ab1FIIDF (ORCPT ); Thu, 9 Jun 2011 04:03:05 -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, 9 Jun 2011 09:02:48 +0100 Message-Id: <1307606573-24704-10-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1307606573-24704-1-git-send-email-mgorman@suse.de> References: <1307606573-24704-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1189 Lines: 33 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 ff8918f..f924ca8 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1124,6 +1124,8 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/