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authorSantosh Shilimkar <santosh.shilimkar@oracle.com>2015-09-11 15:44:29 -0700
committerSantosh Shilimkar <santosh.shilimkar@oracle.com>2015-10-05 11:19:01 -0700
commitdb6526dcb51b054961a2d96ba43dec23e38818b3 (patch)
tree37d72344806ac00cf13ed36e59b08cba1f882a02 /net/rds
parent4bebdd7a4d2960b2ff6c40b27156d041ea270765 (diff)
downloadlinux-next-db6526dcb51b054961a2d96ba43dec23e38818b3.tar.gz
RDS: use rds_send_xmit() state instead of RDS_LL_SEND_FULL
In Transport indepedent rds_sendmsg(), we shouldn't make decisions based on RDS_LL_SEND_FULL which is used to manage the ring for RDMA based transports. We can safely issue rds_send_xmit() and the using its return value take decision on deferred work. This will also fix the scenario where at times we are seeing connections stuck with the LL_SEND_FULL bit getting set and never cleared. We kick krdsd after any time we see -ENOMEM or -EAGAIN from the ring allocation code. Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/send.c10
-rw-r--r--net/rds/threads.c2
2 files changed, 8 insertions, 4 deletions
diff --git a/net/rds/send.c b/net/rds/send.c
index b0acd45a9d42..a081a6478e67 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -1123,8 +1123,9 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
*/
rds_stats_inc(s_send_queued);
- if (!test_bit(RDS_LL_SEND_FULL, &conn->c_flags))
- rds_send_xmit(conn);
+ ret = rds_send_xmit(conn);
+ if (ret == -ENOMEM || ret == -EAGAIN)
+ queue_delayed_work(rds_wq, &conn->c_send_w, 1);
rds_message_put(rm);
return payload_len;
@@ -1180,8 +1181,9 @@ rds_send_pong(struct rds_connection *conn, __be16 dport)
rds_stats_inc(s_send_queued);
rds_stats_inc(s_send_pong);
- if (!test_bit(RDS_LL_SEND_FULL, &conn->c_flags))
- queue_delayed_work(rds_wq, &conn->c_send_w, 0);
+ ret = rds_send_xmit(conn);
+ if (ret == -ENOMEM || ret == -EAGAIN)
+ queue_delayed_work(rds_wq, &conn->c_send_w, 1);
rds_message_put(rm);
return 0;
diff --git a/net/rds/threads.c b/net/rds/threads.c
index dc2402e871fd..454aa6d23327 100644
--- a/net/rds/threads.c
+++ b/net/rds/threads.c
@@ -162,7 +162,9 @@ void rds_send_worker(struct work_struct *work)
int ret;
if (rds_conn_state(conn) == RDS_CONN_UP) {
+ clear_bit(RDS_LL_SEND_FULL, &conn->c_flags);
ret = rds_send_xmit(conn);
+ cond_resched();
rdsdebug("conn %p ret %d\n", conn, ret);
switch (ret) {
case -EAGAIN: