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authorAndy Grover <andy.grover@oracle.com>2010-03-11 14:50:04 +0100
committerDavid S. Miller <davem@davemloft.net>2010-03-17 05:16:59 +0100
commitb98ba52f96e7cdb4dbe2b06bced83d95d94c9d02 (patch)
tree72e22772c6326ff554bd030bda35abcb1526249e /net/rds/send.c
parentRDS: Fix locking in rds_send_drop_to() (diff)
downloadlinux-b98ba52f96e7cdb4dbe2b06bced83d95d94c9d02.tar.xz
linux-b98ba52f96e7cdb4dbe2b06bced83d95d94c9d02.zip
RDS: only put sockets that have seen congestion on the poll_waitq
rds_poll_waitq's listeners will be awoken if we receive a congestion notification. Bad performance may result because *all* polled sockets contend for this single lock. However, it should not be necessary to wake pollers when a congestion update arrives if they have never experienced congestion, and not putting these on the waitq will hopefully greatly reduce contention. Signed-off-by: Andy Grover <andy.grover@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/send.c')
-rw-r--r--net/rds/send.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/rds/send.c b/net/rds/send.c
index 192a480076d0..51e2def50b12 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -894,8 +894,10 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
queue_delayed_work(rds_wq, &conn->c_conn_w, 0);
ret = rds_cong_wait(conn->c_fcong, dport, nonblock, rs);
- if (ret)
+ if (ret) {
+ rs->rs_seen_congestion = 1;
goto out;
+ }
while (!rds_send_queue_rm(rs, conn, rm, rs->rs_bound_port,
dport, &queued)) {