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| author | Chaitanya Huilgol <chaitanya.huilgol@gmail.com> | 2015-01-23 16:41:25 +0530 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-02-19 13:31:40 +0300 |
| commit | ba988f87f532cd2b8c4740aa8ec49056521ae833 (patch) | |
| tree | 14d535124a9146d02fa0a7e2f76d8778b0bce662 /net/ceph/messenger.c | |
| parent | cf32bd9c86b6917d8446c00ea0081dde6e716a82 (diff) | |
| download | lwn-ba988f87f532cd2b8c4740aa8ec49056521ae833.tar.gz lwn-ba988f87f532cd2b8c4740aa8ec49056521ae833.zip | |
libceph: tcp_nodelay support
TCP_NODELAY socket option set on connection sockets,
disables Nagle’s algorithm and improves latency characteristics.
tcp_nodelay(default)/notcp_nodelay option flags provided to
enable/disable setting the socket option.
Signed-off-by: Chaitanya Huilgol <chaitanya.huilgol@sandisk.com>
[idryomov@redhat.com: NO_TCP_NODELAY -> TCP_NODELAY, minor adjustments]
Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Diffstat (limited to 'net/ceph/messenger.c')
| -rw-r--r-- | net/ceph/messenger.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 33a2f201e460..6b3f54ed65ba 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -510,6 +510,16 @@ static int ceph_tcp_connect(struct ceph_connection *con) return ret; } + if (con->msgr->tcp_nodelay) { + int optval = 1; + + ret = kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, + (char *)&optval, sizeof(optval)); + if (ret) + pr_err("kernel_setsockopt(TCP_NODELAY) failed: %d", + ret); + } + sk_set_memalloc(sock->sk); con->sock = sock; @@ -2922,7 +2932,8 @@ void ceph_messenger_init(struct ceph_messenger *msgr, struct ceph_entity_addr *myaddr, u64 supported_features, u64 required_features, - bool nocrc) + bool nocrc, + bool tcp_nodelay) { msgr->supported_features = supported_features; msgr->required_features = required_features; @@ -2937,6 +2948,7 @@ void ceph_messenger_init(struct ceph_messenger *msgr, get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); encode_my_addr(msgr); msgr->nocrc = nocrc; + msgr->tcp_nodelay = tcp_nodelay; atomic_set(&msgr->stopping, 0); |