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| author | Denis V. Lunev <den@openvz.org> | 2008-02-29 11:17:11 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-29 11:17:11 -0800 |
| commit | 79c911595390c8fdc8d8a487ac1951d854b1cd09 (patch) | |
| tree | 9688e154b321f6c976b2d43abbfd4bb929b18e1a /net/ipv4/icmp.c | |
| parent | 405666db84b984b68fc75794069f424c02e5796c (diff) | |
| download | lwn-79c911595390c8fdc8d8a487ac1951d854b1cd09.tar.gz lwn-79c911595390c8fdc8d8a487ac1951d854b1cd09.zip | |
[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.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 9bcf263f06ca..7c62a0da5264 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 |