AcoSail/kernel_optimize_test
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[NET]: Uninline the sk_stream_alloc_pskb

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This function seems too big for inlining. Indeed, it saves
half-a-kilo when uninlined:

add/remove: 1/0 grow/shrink: 0/7 up/down: 195/-719 (-524)
function                                     old     new   delta
sk_stream_alloc_pskb                           -     195    +195
ip_rt_init                                   529     525      -4
__inet_lookup_listener                       284     274     -10
tcp_sendmsg                                 2583    2486     -97
tcp_sendpage                                1449    1305    -144
tso_fragment                                 417     267    -150
tcp_fragment                                1149     992    -157
__tcp_push_pending_frames                   1998    1841    -157

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-11-29 20:28:50 +11:00 committed by David S. Miller
parent 3015a347dc
commit f561d0f27d
2 changed files with 29 additions and 27 deletions
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29
include/net/sock.h
View File

@ -1192,33 +1192,8 @@ static inline void sk_stream_moderate_sndbuf(struct sock *sk)
}
}
static inline struct sk_buff *sk_stream_alloc_pskb(struct sock *sk,
int size, int mem,
gfp_t gfp)
{
struct sk_buff *skb;
/* The TCP header must be at least 32-bit aligned. */
size = ALIGN(size, 4);
skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
if (skb) {
skb->truesize += mem;
if (sk_stream_wmem_schedule(sk, skb->truesize)) {
/*
* Make sure that we have exactly size bytes
* available to the caller, no more, no less.
*/
skb_reserve(skb, skb_tailroom(skb) - size);
return skb;
}
__kfree_skb(skb);
} else {
sk->sk_prot->enter_memory_pressure();
sk_stream_moderate_sndbuf(sk);
}
return NULL;
}
struct sk_buff *sk_stream_alloc_pskb(struct sock *sk,
int size, int mem, gfp_t gfp);
static inline struct sk_buff *sk_stream_alloc_skb(struct sock *sk,
int size,

27
net/ipv4/tcp.c
View File

@ -629,6 +629,33 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
return ret;
}
struct sk_buff *sk_stream_alloc_pskb(struct sock *sk,
int size, int mem, gfp_t gfp)
{
struct sk_buff *skb;
/* The TCP header must be at least 32-bit aligned. */
size = ALIGN(size, 4);
skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
if (skb) {
skb->truesize += mem;
if (sk_stream_wmem_schedule(sk, skb->truesize)) {
/*
* Make sure that we have exactly size bytes
* available to the caller, no more, no less.
*/
skb_reserve(skb, skb_tailroom(skb) - size);
return skb;
}
__kfree_skb(skb);
} else {
sk->sk_prot->enter_memory_pressure();
sk_stream_moderate_sndbuf(sk);
}
return NULL;
}
static ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset,
size_t psize, int flags)
{