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| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2018-02-27 18:52:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-27 20:19:11 +0100 |
| commit | 401910db4cd425899832a093539222b6174f92a2 (patch) | |
| tree | 7eb70bb22f23c1b7edb5245e17ad0f8c81bfc333 /net/rds/rds.h | |
| parent | selftests/net: revert the zerocopy Rx path for PF_RDS (diff) | |
| download | linux-401910db4cd425899832a093539222b6174f92a2.tar.xz linux-401910db4cd425899832a093539222b6174f92a2.zip | |
rds: deliver zerocopy completion notification with data
This commit is an optimization over commit 01883eda72bd
("rds: support for zcopy completion notification") for PF_RDS sockets.
RDS applications are predominantly request-response transactions, so
it is more efficient to reduce the number of system calls and have
zerocopy completion notification delivered as ancillary data on the
POLLIN channel.
Cookies are passed up as ancillary data (at level SOL_RDS) in a
struct rds_zcopy_cookies when the returned value of recvmsg() is
greater than, or equal to, 0. A max of RDS_MAX_ZCOOKIES may be passed
with each message.
This commit removes support for zerocopy completion notification on
MSG_ERRQUEUE for PF_RDS sockets.
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/rds.h')
| -rw-r--r-- | net/rds/rds.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/rds/rds.h b/net/rds/rds.h index 31cd38852050..33b16353d8f3 100644 --- a/net/rds/rds.h +++ b/net/rds/rds.h @@ -603,6 +603,8 @@ struct rds_sock { /* Socket receive path trace points*/ u8 rs_rx_traces; u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX]; + + struct sk_buff_head rs_zcookie_queue; }; static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) |