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8b0a6b461e
linux/net/rds
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Santosh Shilimkar 8b0a6b461e RDS: make socket bind/release locking scheme simple and more efficient 
RDS bind and release locking scheme is very inefficient. It
uses RCU for maintaining the bind hash-table which is great but
it also needs to hold spinlock for [add/remove]_bound(). So
overall usecase, the hash-table concurrent speedup doesn't pay off.
In fact blocking nature of synchronize_rcu() makes the RDS
socket shutdown too slow which hurts RDS performance since
connection shutdown and re-connect happens quite often to
maintain the RC part of the protocol.

So we make the locking scheme simpler and more efficient by
replacing spin_locks with reader/writer locks and getting rid
off rcu for bind hash-table.

In subsequent patch, we also covert the global lock with per-bucket
lock to reduce the global lock contention.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
2015-09-30 12:43:24 -04:00
..
af_rds.c RDS: make socket bind/release locking scheme simple and more efficient 2015-09-30 12:43:24 -04:00
bind.c RDS: make socket bind/release locking scheme simple and more efficient 2015-09-30 12:43:24 -04:00
cong.c rds: rds_cong_queue_updates needs to defer the congestion update transmission 2015-02-11 14:35:44 -08:00
connection.c RDS: verify the underlying transport exists before creating a connection 2015-09-09 12:38:30 -07:00
ib_cm.c Changes for 4.3 2015-09-09 08:33:31 -07:00
ib_rdma.c RDS: use kfree_rcu in rds_ib_remove_ipaddr 2015-09-30 12:43:24 -04:00
ib_recv.c Changes for 4.3 2015-09-09 08:33:31 -07:00
ib_ring.c
ib_send.c Changes for 4.3 2015-09-09 08:33:31 -07:00
ib_stats.c
ib_sysctl.c net: Convert uses of typedef ctl_table to struct ctl_table 2013-06-13 02:36:09 -07:00
ib.c Changes for 4.3 2015-09-09 08:33:31 -07:00
ib.h RDS: use kfree_rcu in rds_ib_remove_ipaddr 2015-09-30 12:43:24 -04:00
info.c rds: fix an integer overflow test in rds_info_getsockopt() 2015-08-03 15:20:16 -07:00
info.h
iw_cm.c RDS-TCP: Make RDS-TCP work correctly when it is set up in a netns other than init_net 2015-08-07 11:29:57 -07:00
iw_rdma.c RDS: Convert to ib_alloc_mr 2015-08-30 18:08:46 -04:00
iw_recv.c rds: switch ->inc_copy_to_user() to passing iov_iter 2014-11-24 05:16:43 -05:00
iw_ring.c
iw_send.c RDS: Convert to ib_alloc_mr 2015-08-30 18:08:46 -04:00
iw_stats.c
iw_sysctl.c rds: remove the unneed NULL checking 2014-05-09 15:59:45 -04:00
iw.c Changes for 4.3 2015-09-09 08:33:31 -07:00
iw.h rds: switch ->inc_copy_to_user() to passing iov_iter 2014-11-24 05:16:43 -05:00
Kconfig net/rds: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:02 -08:00
loop.c RDS: use gfp flags from caller in conn_alloc() 2012-03-22 19:29:58 -04:00
loop.h
Makefile
message.c rds: Make rds_message_copy_from_user() return 0 on success. 2015-02-07 22:41:56 -08:00
page.c net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
rdma_transport.c RDS: check for valid cm_id before initiating connection 2015-08-25 13:35:31 -07:00
rdma_transport.h
rdma.c RDS: Fix rds MR reference count in rds_rdma_unuse() 2015-08-25 16:28:10 -07:00
rds.h RDS: make sure we post recv buffers 2015-08-25 13:35:30 -07:00
recv.c net: Remove iocb argument from sendmsg and recvmsg 2015-03-02 13:06:31 -05:00
send.c RDS: return EMSGSIZE for oversize requests before processing/queueing 2015-08-25 13:35:31 -07:00
stats.c net/rds: zero last byte for strncpy 2013-03-08 00:35:44 -05:00
sysctl.c net: rds: use correct size for max unacked packets and bytes 2015-02-04 16:07:27 -08:00
tcp_connect.c RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns. 2015-08-07 11:29:58 -07:00
tcp_listen.c RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns. 2015-08-07 11:29:58 -07:00
tcp_recv.c rds: switch ->inc_copy_to_user() to passing iov_iter 2014-11-24 05:16:43 -05:00
tcp_send.c arch: Mass conversion of smp_mb__*() 2014-04-18 14:20:48 +02:00
tcp_stats.c net: rds: fix const array syntax 2011-07-01 16:16:19 -07:00
tcp.c RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns. 2015-08-07 11:29:58 -07:00
tcp.h RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns. 2015-08-07 11:29:58 -07:00
threads.c net/rds: call rds_conn_drop instead of open code it at rds_connect_complete 2014-10-03 12:51:59 -07:00
transport.c RDS-TCP: Make RDS-TCP work correctly when it is set up in a netns other than init_net 2015-08-07 11:29:57 -07:00