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| author | Paolo Abeni <pabeni@redhat.com> | 2016-10-21 13:55:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-22 17:05:05 -0400 |
| commit | 850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9 (patch) | |
| tree | bdb5f6df459764e4a78d835200917d90c3330652 /net/sunrpc/svcsock.c | |
| parent | f970bd9e3a06f06df8d8ecf1f8ad2c8615cc17eb (diff) | |
| download | linux-850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9.tar.gz linux-850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9.tar.bz2 linux-850cbaddb52dfd4e0c7cabe2c168dd34b44ae0b9.zip | |
udp: use it's own memory accounting schema
Completely avoid default sock memory accounting and replace it
with udp-specific accounting.
Since the new memory accounting model encapsulates completely
the required locking, remove the socket lock on both enqueue and
dequeue, and avoid using the backlog on enqueue.
Be sure to clean-up rx queue memory on socket destruction, using
udp its own sk_destruct.
Tested using pktgen with random src port, 64 bytes packet,
wire-speed on a 10G link as sender and udp_sink as the receiver,
using an l4 tuple rxhash to stress the contention, and one or more
udp_sink instances with reuseport.
nr readers Kpps (vanilla) Kpps (patched)
1 170 440
3 1250 2150
6 3000 3650
9 4200 4450
12 5700 6250
v4 -> v5:
- avoid unneeded test in first_packet_length
v3 -> v4:
- remove useless sk_rcvqueues_full() call
v2 -> v3:
- do not set the now unsed backlog_rcv callback
v1 -> v2:
- add memory pressure support
- fixed dropwatch accounting for ipv6
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sunrpc/svcsock.c')
| -rw-r--r-- | net/sunrpc/svcsock.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 57625f64efd5..e2a55dc787e6 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -39,6 +39,7 @@ #include <net/checksum.h> #include <net/ip.h> #include <net/ipv6.h> +#include <net/udp.h> #include <net/tcp.h> #include <net/tcp_states.h> #include <asm/uaccess.h> @@ -129,6 +130,18 @@ static void svc_release_skb(struct svc_rqst *rqstp) } } +static void svc_release_udp_skb(struct svc_rqst *rqstp) +{ + struct sk_buff *skb = rqstp->rq_xprt_ctxt; + + if (skb) { + rqstp->rq_xprt_ctxt = NULL; + + dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); + consume_skb(skb); + } +} + union svc_pktinfo_u { struct in_pktinfo pkti; struct in6_pktinfo pkti6; @@ -575,7 +588,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) goto out_free; } local_bh_enable(); - skb_free_datagram_locked(svsk->sk_sk, skb); + consume_skb(skb); } else { /* we can use it in-place */ rqstp->rq_arg.head[0].iov_base = skb->data; @@ -602,8 +615,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) return len; out_free: - trace_kfree_skb(skb, svc_udp_recvfrom); - skb_free_datagram_locked(svsk->sk_sk, skb); + kfree_skb(skb); return 0; } @@ -660,7 +672,7 @@ static struct svc_xprt_ops svc_udp_ops = { .xpo_create = svc_udp_create, .xpo_recvfrom = svc_udp_recvfrom, .xpo_sendto = svc_udp_sendto, - .xpo_release_rqst = svc_release_skb, + .xpo_release_rqst = svc_release_udp_skb, .xpo_detach = svc_sock_detach, .xpo_free = svc_sock_free, .xpo_prep_reply_hdr = svc_udp_prep_reply_hdr, |