From: Satoshi OSHIMA <satoshi.oshima.fk@hitachi.com>
To: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>,
Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
Herbert Xu <herbert@gondor.apana.org.au>,
?? ?? <yoshfuji@linux-ipv6.org>,
Yumiko SUGITA <yumiko.sugita.yf@hitachi.com>,
"??@RedHat" <haoki@redhat.com>
Subject: [RFC/PATCH 1/3] UDP memory usage accounting (take 3): fix send buffer check
Date: Tue, 02 Oct 2007 22:11:30 +0900 [thread overview]
Message-ID: <47024382.80907@hitachi.com> (raw)
In-Reply-To: <4702430C.2080002@hitachi.com>
This patch introduces sndbuf size check before
memory allcation for send buffer.
signed-off-by: Satoshi Oshima <satoshi.oshima.fk@hitachi.com>
signed-off-by: Hideo Aoki <haoki@redhat.com>
Index: 2.6.23-rc7-udp_limit/net/ipv4/ip_output.c
===================================================================
--- 2.6.23-rc7-udp_limit.orig/net/ipv4/ip_output.c
+++ 2.6.23-rc7-udp_limit/net/ipv4/ip_output.c
@@ -1004,6 +1004,11 @@ alloc_new_skb:
frag = &skb_shinfo(skb)->frags[i];
}
} else if (i < MAX_SKB_FRAGS) {
+ if (atomic_read(&sk->sk_wmem_alloc) + PAGE_SIZE
+ > 2 * sk->sk_sndbuf) {
+ err = -ENOBUFS;
+ goto error;
+ }
if (copy > PAGE_SIZE)
copy = PAGE_SIZE;
page = alloc_pages(sk->sk_allocation, 0);
next prev parent reply other threads:[~2007-10-02 13:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-02 13:09 [RFC/PATCH 0/3] UDP memory usage accounting (take 3) Satoshi OSHIMA
2007-10-02 13:11 ` Satoshi OSHIMA [this message]
2007-10-02 13:13 ` [RFC/PATCH 2/3] UDP memory usage accounting (take 3): accounting unit and variable Satoshi OSHIMA
2007-10-02 13:14 ` [RFC/PATCH 3/3] UDP memory usage accounting (take 3): measurement Satoshi OSHIMA
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