linux-kernel - [PATCH] [123/223] netfilter: nf_conntrack: allow nf_ct_alloc

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Message-Id: <20101212234704.C4E03B27BF@basil.firstfloor.org>
Date:	Mon, 13 Dec 2010 00:47:04 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	eric.dumazet@...il.com, kaber@...sh.net, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org, stable@...nel.org
Subject: [PATCH] [123/223] netfilter: nf_conntrack: allow nf_ct_alloc_hashtable() to get highmem pages

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Eric Dumazet <eric.dumazet@...il.com>

commit 6b1686a71e3158d3c5f125260effce171cc7852b upstream.

commit ea781f197d6a8 (use SLAB_DESTROY_BY_RCU and get rid of call_rcu())
did a mistake in __vmalloc() call in nf_ct_alloc_hashtable().

I forgot to add __GFP_HIGHMEM, so pages were taken from LOWMEM only.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
Signed-off-by: Patrick McHardy <kaber@...sh.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 net/netfilter/nf_conntrack_core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux/net/netfilter/nf_conntrack_core.c
===================================================================
--- linux.orig/net/netfilter/nf_conntrack_core.c
+++ linux/net/netfilter/nf_conntrack_core.c
@@ -1252,7 +1252,8 @@ void *nf_ct_alloc_hashtable(unsigned int
 	if (!hash) {
 		*vmalloced = 1;
 		printk(KERN_WARNING "nf_conntrack: falling back to vmalloc.\n");
-		hash = __vmalloc(sz, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
+		hash = __vmalloc(sz, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
+				 PAGE_KERNEL);
 	}
 
 	if (hash && nulls)
--
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