diff options
| author |   Trond Myklebust <trond.myklebust@primarydata.com> | 2018-01-14 15:47:06 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2018-01-14 23:06:30 -0500 |
| commit | 3d188805f83250409fc251bfb0a699810086885b (patch) | |
| tree | f83cf9acd09846f8236cb6c6e4541c5ed624b73a /net/sunrpc | |
| parent | SUNRPC: Remove rpc_protocol() (diff) | |
| download | linux-dev-3d188805f83250409fc251bfb0a699810086885b.tar.xz linux-dev-3d188805f83250409fc251bfb0a699810086885b.zip | |
SUNRPC: Chunk reading of replies from the server
Read the TCP data in chunks of max 2MB so that we do not hog the
socket lock.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprtsock.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 6d0cc3b8f932..620be573d78b 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -52,6 +52,8 @@ #include "sunrpc.h" +#define RPC_TCP_READ_CHUNK_SZ (3*512*1024) + static void xs_close(struct rpc_xprt *xprt); static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt, struct socket *sock); @@ -1479,6 +1481,7 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns .offset = offset, .count = len, }; + size_t ret; dprintk("RPC: xs_tcp_data_recv started\n"); do { @@ -1507,9 +1510,14 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns /* Skip over any trailing bytes on short reads */ xs_tcp_read_discard(transport, &desc); } while (desc.count); + ret = len - desc.count; + if (ret < rd_desc->count) + rd_desc->count -= ret; + else + rd_desc->count = 0; trace_xs_tcp_data_recv(transport); dprintk("RPC: xs_tcp_data_recv done\n"); - return len - desc.count; + return ret; } static void xs_tcp_data_receive(struct sock_xprt *transport) @@ -1517,7 +1525,6 @@ static void xs_tcp_data_receive(struct sock_xprt *transport) struct rpc_xprt *xprt = &transport->xprt; struct sock *sk; read_descriptor_t rd_desc = { - .count = 2*1024*1024, .arg.data = xprt, }; unsigned long total = 0; @@ -1531,16 +1538,16 @@ static void xs_tcp_data_receive(struct sock_xprt *transport) /* We use rd_desc to pass struct xprt to xs_tcp_data_recv */ for (loop = 0; loop < 64; loop++) { + rd_desc.count = RPC_TCP_READ_CHUNK_SZ; lock_sock(sk); read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv); - if (read <= 0) { + if (rd_desc.count != 0 || read < 0) { clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state); release_sock(sk); break; } release_sock(sk); total += read; - rd_desc.count = 65536; } if (test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state)) queue_work(xprtiod_workqueue, &transport->recv_worker); |