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| author | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2015-09-11 15:44:29 -0700 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2015-10-05 11:19:01 -0700 |
| commit | db6526dcb51b054961a2d96ba43dec23e38818b3 (patch) | |
| tree | 37d72344806ac00cf13ed36e59b08cba1f882a02 | |
| parent | 4bebdd7a4d2960b2ff6c40b27156d041ea270765 (diff) | |
| download | linux-db6526dcb51b054961a2d96ba43dec23e38818b3.tar.gz linux-db6526dcb51b054961a2d96ba43dec23e38818b3.tar.bz2 linux-db6526dcb51b054961a2d96ba43dec23e38818b3.zip | |
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>
| -rw-r--r-- | net/rds/send.c | 10 | ||||
| -rw-r--r-- | net/rds/threads.c | 2 |
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: |