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Sowmini Varadhan 401910db4c rds: deliver zerocopy completion notification with data 
This commit is an optimization over commit 01883eda72
("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>
2018-02-27 14:19:11 -05:00
..
6lowpan License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
9p virtio: bugfixes 2018-02-15 14:29:27 -08:00
802 treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
8021q net: Convert /proc creating and destroying pernet_operations 2018-02-27 11:01:35 -05:00
appletalk net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
atm net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
ax25 net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
batman-adv vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2018-02-15 15:43:49 -05:00
bpf bpf: fix null pointer deref in bpf_prog_test_run_xdp 2018-02-01 07:43:56 -08:00
bridge net: Convert brnf_net_ops 2018-02-27 11:01:38 -05:00
caif vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
can net: Convert /proc creating and destroying pernet_operations 2018-02-27 11:01:35 -05:00
ceph libceph: check kstrndup() return value 2018-01-29 18:36:12 +01:00
core net: make kmem caches as __ro_after_init 2018-02-26 15:11:48 -05:00
dcb
dccp vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-19 18:46:11 -05:00
dns_resolver afs: Support the AFS dynamic root 2018-02-06 14:43:37 +00:00
dsa net: dsa: forward timestamping callbacks to switch drivers 2018-02-14 14:33:37 -05:00
ethernet
hsr net: hsr: Convert timers to use timer_setup() 2017-10-25 13:00:27 +09:00
ieee802154 Merge branch 'ieee802154-for-davem-2018-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next 2018-02-27 11:14:57 -05:00
ife MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
ipv4 net: Convert defrag4_net_ops 2018-02-27 11:01:39 -05:00
ipv6 net: Convert defrag6_net_ops 2018-02-27 11:01:39 -05:00
iucv net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
kcm net: Convert simple pernet_operations 2018-02-27 11:01:35 -05:00
key net: Convert /proc creating and destroying pernet_operations 2018-02-27 11:01:35 -05:00
l2tp net: Convert /proc creating and destroying pernet_operations 2018-02-27 11:01:35 -05:00
l3mdev
lapb treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts 2017-11-21 16:35:54 -08:00
llc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-24 00:04:20 -05:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
mpls mpls, nospec: Sanitize array index in mpls_label_ok() 2018-02-08 15:24:12 -05:00
ncsi net/ncsi: Don't take any action on HNCDSC AEN 2017-12-18 14:50:11 -05:00
netfilter net: Convert sysctl creating and destroying pernet_operations 2018-02-27 11:01:36 -05:00
netlabel net/netlabel: Add list_next_rcu() in rcu_dereference(). 2017-11-18 10:32:41 +09:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-24 00:04:20 -05:00
netrom net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-19 18:46:11 -05:00
nsh openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
openvswitch openvswitch: Remove padding from packet before L3+ conntrack processing 2018-02-01 09:46:22 -05:00
packet net: Convert packet_net_ops 2018-02-13 10:36:08 -05:00
phonet net: Convert /proc creating and destroying pernet_operations 2018-02-27 11:01:35 -05:00
psample MAINTAINERS: Update Yotam's E-mail 2017-11-01 12:19:03 +09:00
qrtr net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
rds rds: deliver zerocopy completion notification with data 2018-02-27 14:19:11 -05:00
rfkill vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rose net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
rxrpc rxrpc: Fix send in rxrpc_send_data_packet() 2018-02-22 15:37:47 -05:00
sched net: Convert tc_action_net_init() and tc_action_net_exit() based pernet_operations 2018-02-27 11:01:36 -05:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-19 18:46:11 -05:00
smc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
strparser strparser: Call sock_owned_by_user_nocheck 2017-12-28 14:28:22 -05:00
sunrpc net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
switchdev net: bridge: Add/del switchdev object on host join/leave 2017-11-10 13:41:40 +09:00
tipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-19 18:46:11 -05:00
tls tls: getsockopt return record sequence number 2018-02-14 15:05:19 -05:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-19 18:46:11 -05:00
vmw_vsock net: make getname() functions return length rather than use int* parameter 2018-02-12 14:15:04 -05:00
wimax License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-02-24 00:04:20 -05:00
x25 x25: use %*ph to print small buffer 2018-02-20 13:51:47 -05:00
xfrm net: Convert pernet_subsys, registered from inet_init() 2018-02-13 10:36:08 -05:00
compat.c
Kconfig Staging/IIO patches for 4.16-rc1 2018-02-01 09:51:57 -08:00
Makefile ipx: move Novell IPX protocol support into staging 2017-11-28 13:55:00 +01:00
socket.c net: make kmem caches as __ro_after_init 2018-02-26 15:11:48 -05:00
sysctl_net.c net: Convert sysctl_pernet_ops 2018-02-13 10:36:05 -05:00