linux-kernel - Re: Fwd: Memory exhaust issue with only IPsec policies configured on continuous traffic

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Message-ID: <1336627923.12504.128.camel@edumazet-glaptop>
Date:	Thu, 10 May 2012 07:32:03 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Nikhil Agarwal <hi2nikhil@...il.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au, benjamin.thery@...l.net,
	davem@...emloft.net, pstaszewski@...are.pl
Subject: Re: Fwd: Memory exhaust issue with only IPsec policies configured
 on continuous traffic

On Thu, 2012-05-10 at 07:27 +0200, Eric Dumazet wrote:

> Yep, we can use DST_NOCACHE
> 

Please try following patch :

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 5773f5d..172c251 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2896,6 +2896,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
 	if (rt) {
 		struct dst_entry *new = &rt->dst;
 
+		new->flags |= DST_NOCACHE;
 		new->__use = 1;
 		new->input = dst_discard;
 		new->output = dst_discard;


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