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Date: Thu, 1 Oct 2009 19:37:22 +0530
From: Suresh Jayaraman <sjayaraman@...e.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc: netdev@...r.kernel.org, Neil Brown <neilb@...e.de>,
Miklos Szeredi <mszeredi@...e.cz>, Wouter Verhelst <w@...r.be>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
trond.myklebust@....uio.no, Suresh Jayaraman <sjayaraman@...e.de>
Subject: [PATCH 14/31] net: sk_allocation() - concentrate socket related allocations
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Introduce sk_allocation(), this function allows to inject sock specific
flags to each sock related allocation.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Suresh Jayaraman <sjayaraman@...e.de>
---
include/net/sock.h | 5 +++++
net/ipv4/tcp.c | 3 ++-
net/ipv4/tcp_output.c | 12 +++++++-----
net/ipv6/tcp_ipv6.c | 15 +++++++++++----
4 files changed, 25 insertions(+), 10 deletions(-)
Index: mmotm/include/net/sock.h
===================================================================
--- mmotm.orig/include/net/sock.h
+++ mmotm/include/net/sock.h
@@ -526,6 +526,11 @@ static inline int sock_flag(struct sock
return test_bit(flag, &sk->sk_flags);
}
+static inline gfp_t sk_allocation(struct sock *sk, gfp_t gfp_mask)
+{
+ return gfp_mask;
+}
+
static inline void sk_acceptq_removed(struct sock *sk)
{
sk->sk_ack_backlog--;
Index: mmotm/net/ipv4/tcp.c
===================================================================
--- mmotm.orig/net/ipv4/tcp.c
+++ mmotm/net/ipv4/tcp.c
@@ -645,7 +645,8 @@ struct sk_buff *sk_stream_alloc_skb(stru
/* 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);
+ skb = alloc_skb_fclone(size + sk->sk_prot->max_header,
+ sk_allocation(sk, gfp));
if (skb) {
if (sk_wmem_schedule(sk, skb->truesize)) {
/*
Index: mmotm/net/ipv4/tcp_output.c
===================================================================
--- mmotm.orig/net/ipv4/tcp_output.c
+++ mmotm/net/ipv4/tcp_output.c
@@ -2101,7 +2101,8 @@ void tcp_send_fin(struct sock *sk)
} else {
/* Socket is locked, keep trying until memory is available. */
for (;;) {
- skb = alloc_skb_fclone(MAX_TCP_HEADER, GFP_KERNEL);
+ skb = alloc_skb_fclone(MAX_TCP_HEADER,
+ sk_allocation(sk, GFP_KERNEL));
if (skb)
break;
yield();
@@ -2127,7 +2128,7 @@ void tcp_send_active_reset(struct sock *
struct sk_buff *skb;
/* NOTE: No TCP options attached and we never retransmit this. */
- skb = alloc_skb(MAX_TCP_HEADER, priority);
+ skb = alloc_skb(MAX_TCP_HEADER, sk_allocation(sk, priority));
if (!skb) {
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTFAILED);
return;
@@ -2196,7 +2197,8 @@ struct sk_buff *tcp_make_synack(struct s
__u8 *md5_hash_location;
int mss;
- skb = sock_wmalloc(sk, MAX_TCP_HEADER + 15, 1, GFP_ATOMIC);
+ skb = sock_wmalloc(sk, MAX_TCP_HEADER + 15, 1,
+ sk_allocation(sk, GFP_ATOMIC));
if (skb == NULL)
return NULL;
@@ -2443,7 +2445,7 @@ void tcp_send_ack(struct sock *sk)
* tcp_transmit_skb() will set the ownership to this
* sock.
*/
- buff = alloc_skb(MAX_TCP_HEADER, GFP_ATOMIC);
+ buff = alloc_skb(MAX_TCP_HEADER, sk_allocation(sk, GFP_ATOMIC));
if (buff == NULL) {
inet_csk_schedule_ack(sk);
inet_csk(sk)->icsk_ack.ato = TCP_ATO_MIN;
@@ -2478,7 +2480,7 @@ static int tcp_xmit_probe_skb(struct soc
struct sk_buff *skb;
/* We don't queue it, tcp_transmit_skb() sets ownership. */
- skb = alloc_skb(MAX_TCP_HEADER, GFP_ATOMIC);
+ skb = alloc_skb(MAX_TCP_HEADER, sk_allocation(sk, GFP_ATOMIC));
if (skb == NULL)
return -1;
Index: mmotm/net/ipv6/tcp_ipv6.c
===================================================================
--- mmotm.orig/net/ipv6/tcp_ipv6.c
+++ mmotm/net/ipv6/tcp_ipv6.c
@@ -584,7 +584,8 @@ static int tcp_v6_md5_do_add(struct sock
} else {
/* reallocate new list if current one is full. */
if (!tp->md5sig_info) {
- tp->md5sig_info = kzalloc(sizeof(*tp->md5sig_info), GFP_ATOMIC);
+ tp->md5sig_info = kzalloc(sizeof(*tp->md5sig_info),
+ sk_allocation(sk, GFP_ATOMIC));
if (!tp->md5sig_info) {
kfree(newkey);
return -ENOMEM;
@@ -597,7 +598,8 @@ static int tcp_v6_md5_do_add(struct sock
}
if (tp->md5sig_info->alloced6 == tp->md5sig_info->entries6) {
keys = kmalloc((sizeof (tp->md5sig_info->keys6[0]) *
- (tp->md5sig_info->entries6 + 1)), GFP_ATOMIC);
+ (tp->md5sig_info->entries6 + 1)),
+ sk_allocation(sk, GFP_ATOMIC));
if (!keys) {
tcp_free_md5sig_pool();
@@ -721,7 +723,8 @@ static int tcp_v6_parse_md5_keys (struct
struct tcp_sock *tp = tcp_sk(sk);
struct tcp_md5sig_info *p;
- p = kzalloc(sizeof(struct tcp_md5sig_info), GFP_KERNEL);
+ p = kzalloc(sizeof(struct tcp_md5sig_info),
+ sk_allocation(sk, GFP_KERNEL));
if (!p)
return -ENOMEM;
@@ -987,6 +990,7 @@ static void tcp_v6_send_response(struct
unsigned int tot_len = sizeof(struct tcphdr);
struct dst_entry *dst;
__be32 *topt;
+ gfp_t gfp_mask = GFP_ATOMIC;
if (ts)
tot_len += TCPOLEN_TSTAMP_ALIGNED;
@@ -996,7 +1000,7 @@ static void tcp_v6_send_response(struct
#endif
buff = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) + tot_len,
- GFP_ATOMIC);
+ gfp_mask);
if (buff == NULL)
return;
@@ -1073,6 +1077,7 @@ static void tcp_v6_send_reset(struct soc
struct tcphdr *th = tcp_hdr(skb);
u32 seq = 0, ack_seq = 0;
struct tcp_md5sig_key *key = NULL;
+ gfp_t gfp_mask = GFP_ATOMIC;
if (th->rst)
return;
@@ -1084,6 +1089,8 @@ static void tcp_v6_send_reset(struct soc
if (sk)
key = tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr);
#endif
+ if (sk)
+ gfp_mask = sk_allocation(sk, gfp_mask);
if (th->ack)
seq = ntohl(th->ack_seq);
--
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