From 99a1dec70d5acbd8c6b3928cdebb4a2d1da676c8 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Tue, 31 Jul 2012 16:44:14 -0700 Subject: [PATCH] net: introduce sk_gfp_atomic() to allow addition of GFP flags depending on the individual socket Introduce sk_gfp_atomic(), this function allows to inject sock specific flags to each sock related allocation. It is only used on allocation paths that may be required for writing pages back to network storage. [davem@davemloft.net: Use sk_gfp_atomic only when necessary] Signed-off-by: Peter Zijlstra Signed-off-by: Mel Gorman Acked-by: David S. Miller Cc: Neil Brown Cc: Mike Christie Cc: Eric B Munson Cc: Eric Dumazet Cc: Sebastian Andrzej Siewior Cc: Mel Gorman Cc: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/net/sock.h | 5 +++++ net/ipv4/tcp_output.c | 12 +++++++----- net/ipv6/tcp_ipv6.c | 8 +++++--- 3 files changed, 17 insertions(+), 8 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index cee528c119ca..11ccde65c4cf 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -658,6 +658,11 @@ static inline bool sock_flag(const struct sock *sk, enum sock_flags flag) return test_bit(flag, &sk->sk_flags); } +static inline gfp_t sk_gfp_atomic(struct sock *sk, gfp_t gfp_mask) +{ + return GFP_ATOMIC; +} + static inline void sk_acceptq_removed(struct sock *sk) { sk->sk_ack_backlog--; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 33cd065cfbd8..3f1bcff0b10b 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2045,7 +2045,8 @@ void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss, if (unlikely(sk->sk_state == TCP_CLOSE)) return; - if (tcp_write_xmit(sk, cur_mss, nonagle, 0, GFP_ATOMIC)) + if (tcp_write_xmit(sk, cur_mss, nonagle, 0, + sk_gfp_atomic(sk, GFP_ATOMIC))) tcp_check_probe_timer(sk); } @@ -2666,7 +2667,8 @@ struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst, if (cvp != NULL && cvp->s_data_constant && cvp->s_data_desired) s_data_desired = cvp->s_data_desired; - skb = alloc_skb(MAX_TCP_HEADER + 15 + s_data_desired, GFP_ATOMIC); + skb = alloc_skb(MAX_TCP_HEADER + 15 + s_data_desired, + sk_gfp_atomic(sk, GFP_ATOMIC)); if (unlikely(!skb)) { dst_release(dst); return NULL; @@ -3064,7 +3066,7 @@ 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_gfp_atomic(sk, GFP_ATOMIC)); if (buff == NULL) { inet_csk_schedule_ack(sk); inet_csk(sk)->icsk_ack.ato = TCP_ATO_MIN; @@ -3079,7 +3081,7 @@ void tcp_send_ack(struct sock *sk) /* Send it off, this clears delayed acks for us. */ TCP_SKB_CB(buff)->when = tcp_time_stamp; - tcp_transmit_skb(sk, buff, 0, GFP_ATOMIC); + tcp_transmit_skb(sk, buff, 0, sk_gfp_atomic(sk, GFP_ATOMIC)); } /* This routine sends a packet with an out of date sequence @@ -3099,7 +3101,7 @@ static int tcp_xmit_probe_skb(struct sock *sk, int urgent) 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_gfp_atomic(sk, GFP_ATOMIC)); if (skb == NULL) return -1; diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 61c7b6d83176..c66b90f71c9b 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1299,7 +1299,8 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, /* Clone pktoptions received with SYN */ newnp->pktoptions = NULL; if (treq->pktopts != NULL) { - newnp->pktoptions = skb_clone(treq->pktopts, GFP_ATOMIC); + newnp->pktoptions = skb_clone(treq->pktopts, + sk_gfp_atomic(sk, GFP_ATOMIC)); consume_skb(treq->pktopts); treq->pktopts = NULL; if (newnp->pktoptions) @@ -1349,7 +1350,8 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, * across. Shucks. */ tcp_md5_do_add(newsk, (union tcp_md5_addr *)&newnp->daddr, - AF_INET6, key->key, key->keylen, GFP_ATOMIC); + AF_INET6, key->key, key->keylen, + sk_gfp_atomic(sk, GFP_ATOMIC)); } #endif @@ -1442,7 +1444,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) --ANK (980728) */ if (np->rxopt.all) - opt_skb = skb_clone(skb, GFP_ATOMIC); + opt_skb = skb_clone(skb, sk_gfp_atomic(sk, GFP_ATOMIC)); if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */ sock_rps_save_rxhash(sk, skb); -- 2.20.1