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authorDenis V. Lunev <den@openvz.org>2008-02-29 11:17:11 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-29 11:17:11 -0800
commit79c911595390c8fdc8d8a487ac1951d854b1cd09 (patch)
tree9688e154b321f6c976b2d43abbfd4bb929b18e1a /net/ipv4/icmp.c
parent405666db84b984b68fc75794069f424c02e5796c (diff)
downloadop-kernel-dev-79c911595390c8fdc8d8a487ac1951d854b1cd09.zip
op-kernel-dev-79c911595390c8fdc8d8a487ac1951d854b1cd09.tar.gz
[ICMP]: Allocate data for __icmp(v6)_sk dynamically.
Own __icmp(v6)_sk should be present in each namespace. So, it should be allocated dynamically. Though, alloc_percpu does not fit the case as it implies additional dereferrence for no bonus. Allocate data for pointers just like __percpu_alloc_mask does and place pointers to struct sock into this array. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/icmp.c')
-rw-r--r--net/ipv4/icmp.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 9bcf263..7c62a0d 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -229,8 +229,8 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
*
* On SMP we have one ICMP socket per-cpu.
*/
-static DEFINE_PER_CPU(struct sock *, __icmp_sk) = NULL;
-#define icmp_sk __get_cpu_var(__icmp_sk)
+static struct sock **__icmp_sk = NULL;
+#define icmp_sk (__icmp_sk[smp_processor_id()])
static inline int icmp_xmit_lock(struct sock *sk)
{
@@ -1149,18 +1149,23 @@ static void __exit icmp_exit(void)
for_each_possible_cpu(i) {
struct sock *sk;
- sk = per_cpu(__icmp_sk, i);
+ sk = __icmp_sk[i];
if (sk == NULL)
continue;
- per_cpu(__icmp_sk, i) = NULL;
sock_release(sk->sk_socket);
}
+ kfree(__icmp_sk);
+ __icmp_sk = NULL;
}
int __init icmp_init(void)
{
int i, err;
+ __icmp_sk = kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
+ if (__icmp_sk == NULL)
+ return -ENOMEM;
+
for_each_possible_cpu(i) {
struct sock *sk;
struct socket *sock;
@@ -1170,7 +1175,7 @@ int __init icmp_init(void)
if (err < 0)
goto fail;
- per_cpu(__icmp_sk, i) = sk = sock->sk;
+ __icmp_sk[i] = sk = sock->sk;
sk->sk_allocation = GFP_ATOMIC;
/* Enough space for 2 64K ICMP packets, including
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