David Howells
00e907127e
rxrpc: Preallocate peers, conns and calls for incoming service requests ...
Make it possible for the data_ready handler called from the UDP transport
socket to completely instantiate an rxrpc_call structure and make it
immediately live by preallocating all the memory it might need. The idea
is to cut out the background thread usage as much as possible.
[Note that the preallocated structs are not actually used in this patch -
that will be done in a future patch.]
If insufficient resources are available in the preallocation buffers, it
will be possible to discard the DATA packet in the data_ready handler or
schedule a BUSY packet without the need to schedule an attempt at
allocation in a background thread.
To this end:
(1) Preallocate rxrpc_peer, rxrpc_connection and rxrpc_call structs to a
maximum number each of the listen backlog size. The backlog size is
limited to a maxmimum of 32. Only this many of each can be in the
preallocation buffer.
(2) For userspace sockets, the preallocation is charged initially by
listen() and will be recharged by accepting or rejecting pending
new incoming calls.
(3) For kernel services {,re,dis}charging of the preallocation buffers is
handled manually. Two notifier callbacks have to be provided before
kernel_listen() is invoked:
(a) An indication that a new call has been instantiated. This can be
used to trigger background recharging.
(b) An indication that a call is being discarded. This is used when
the socket is being released.
A function, rxrpc_kernel_charge_accept() is called by the kernel
service to preallocate a single call. It should be passed the user ID
to be used for that call and a callback to associate the rxrpc call
with the kernel service's side of the ID.
(4) Discard the preallocation when the socket is closed.
(5) Temporarily bump the refcount on the call allocated in
rxrpc_incoming_call() so that rxrpc_release_call() can ditch the
preallocation ref on service calls unconditionally. This will no
longer be necessary once the preallocation is used.
Note that this does not yet control the number of active service calls on a
client - that will come in a later patch.
A future development would be to provide a setsockopt() call that allows a
userspace server to manually charge the preallocation buffer. This would
allow user call IDs to be provided in advance and the awkward manual accept
stage to be bypassed.
Signed-off-by: David Howells <dhowells@redhat.com>
2016-09-08 11:10:12 +01:00
9p: switch p9_client_read() to passing struct iov_iter *
2015-04-11 22:28:27 -04:00
Bluetooth: Add debugfs fields for hardware and firmware info
2016-07-18 09:33:28 +03:00
s390/iucv: do not use arrays as argument
2015-09-21 16:03:04 -07:00
netfilter: log: Check param to avoid overflow in nf_log_set
2016-08-30 11:52:32 +02:00
netfilter: remove ip_conntrack* sysctl compat code
2016-08-13 13:27:13 +02:00
NFC: digital: Add support for NFC DEP Response Waiting Time
2016-07-11 02:01:14 +02:00
sock: struct proto hash function may error
2016-02-11 03:54:14 -05:00
sctp: change to use TCP_CLOSE_WAIT as SCTP_SS_CLOSING
2016-08-01 13:32:50 -07:00
net_sched: act_vlan: Add priority option
2016-08-18 23:13:14 -07:00
6lowpan: add 802.15.4 short addr slaac
2016-06-15 20:41:22 -07:00
net_sched: convert tcf_exts from list to pointer array
2016-08-17 19:27:51 -04:00
ipv6: export several functions
2016-06-15 20:41:23 -07:00
ieee802154: af_ieee802154: fix typo in comment.
2015-09-17 13:20:05 +02:00
rxrpc: Preallocate peers, conns and calls for incoming service requests
2016-09-08 11:10:12 +01:00
unix: correctly track in-flight fds in sending process user_struct
2016-02-08 10:30:42 -05:00
VSOCK: Introduce virtio_vsock_common.ko
2016-08-02 02:57:29 +03:00
neigh: Factor out ___neigh_lookup_noref
2015-03-04 00:23:23 -05:00
ax25: Stop using sock->sk_protinfo.
2015-06-28 16:55:44 -07:00
bonding: 3ad: apply ad_actor settings changes immediately
2016-02-09 04:45:49 -05:00
bonding: convert num_grat_arp to the new bonding option API
2015-07-27 01:05:24 -07:00
bonding: prevent out of bound accesses
2016-07-01 06:06:09 -04:00
net: un-inline sk_busy_loop()
2015-11-18 16:17:38 -05:00
calipso: Add a label cache.
2016-06-27 15:06:17 -04:00
cfg80211: Add mesh peer AID setting API
2016-07-06 15:04:52 +02:00
ieee802154: add netns support
2016-07-08 12:20:57 +02:00
csum: Update csum_block_add to use rotate instead of byteswap
2016-03-13 15:01:00 -04:00
cls_cgroup: get sk_classid only from full sockets
2016-04-19 20:09:25 -04:00
codel: split into multiple files
2016-04-25 16:44:27 -04:00
codel: split into multiple files
2016-04-25 16:44:27 -04:00
net_sched: fq_codel: cache skb->truesize into skb->cb
2016-06-25 12:19:35 -04:00
packet: compat support for sock_fprog
2016-06-09 23:41:03 -07:00
net/dcb: Add IEEE QCN attribute
2015-03-06 21:50:02 -05:00
devlink: remove unused priv_size
2016-08-26 11:55:18 -07:00
netfilter: Pass net into okfn
2015-09-17 17:18:37 -07:00
net: dsa: remove ds_to_priv
2016-09-01 22:51:12 -07:00
route: move lwtunnel state to a single place
2016-04-25 16:20:09 -04:00
net: add dst_cache support
2016-02-16 20:21:48 -05:00
ip_tunnel: add support for setting flow label via collect metadata
2016-03-11 15:14:26 -05:00
ipv4, ipv6: Pass net into __ip_local_out and __ip6_local_out
2015-10-08 04:27:02 -07:00
net/ethoc: support big-endian register layout
2015-09-23 15:33:15 -07:00
net: Add l3mdev rule
2016-06-08 11:36:02 -07:00
ipv6, trace: fix tos reporting on fib6_table_lookup
2016-03-20 13:44:34 -04:00
rps: flow_dissector: Add the const for the parameter of flow_keys_have_l4
2016-09-01 16:51:08 -07:00
fou: Add encap ops for IPv6 tunnels
2016-05-20 18:03:16 -04:00
fq: add fair queuing framework
2016-04-25 16:45:53 -04:00
fq: split out backlog update logic
2016-04-28 17:03:38 -04:00
net: sched: do not acquire qdisc spinlock in qdisc/class stats dump
2016-06-07 16:37:14 -07:00
Revert "genl: Add genlmsg_new_unicast() for unicast message allocation"
2016-02-18 11:42:19 -05:00
net: Remove deprecated tunnel specific UDP offload functions
2016-06-17 20:23:32 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-08-18 01:17:32 -04:00
gro_cells: gro_cells_receive now return error code
2016-07-22 00:50:41 -04:00
gtp: #define #define _GTP_H_ and not #define _GTP_H
2016-07-25 17:55:43 -07:00
net: add a hardware buffer management helper API
2016-03-14 12:19:46 -04:00
net: snmp: kill STATS_BH macros
2016-04-27 22:48:25 -04:00
mac802154: constify ieee802154_llsec_ops structure
2016-01-04 20:40:41 +01:00
ipv6: do retries on stable privacy addresses
2015-03-23 22:12:09 -04:00
ila: Add generic ILA translation facility
2015-12-15 23:25:20 -05:00
ipv6: remove unused in6_addr struct
2016-03-22 15:45:44 -04:00
tcp/dccp: do not touch listener sk_refcnt under synflood
2016-04-04 22:11:20 -04:00
ip4ip6: Support for GSO/GRO
2016-05-20 18:03:17 -04:00
tcp/dccp: fix another race at listener dismantle
2016-02-18 11:35:51 -05:00
ipv6: suppress sparse warnings in IP6_ECN_set_ce()
2016-08-13 15:08:00 -07:00
ipv4: namespacify ip fragment max dist sysctl knob
2016-02-16 20:42:54 -05:00
tcp/dccp: do not touch listener sk_refcnt under synflood
2016-04-04 22:11:20 -04:00
ipv6: Allow request socks to contain IPv6 options.
2016-06-27 15:05:28 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-10-20 06:08:27 -07:00
inet: tcp: fix inetpeer_set_addr_v4()
2015-12-16 00:14:12 -05:00
net/ipv4: Introduce IPSKB_FRAG_SEGS bit to inet_skb_parm.flags
2016-07-19 16:40:22 -07:00
ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short
2016-03-13 23:55:13 -04:00
ipv6: Check rt->dst.from for the DST_NOCACHE route
2015-11-15 17:12:37 -05:00
net: ipv6: Move ip6_route_get_saddr to inline
2016-06-17 21:25:29 -07:00
ipv6: hide ip6_encap_hlen/ip6_tnl_encap definitions
2016-05-29 22:24:21 -07:00
route: check and remove route cache when we get route
2016-02-18 11:31:36 -05:00
gre: better support for ICMP messages for gre+ipv6
2016-06-18 22:11:39 -07:00
ipvs: update real-server binding of outgoing connections in SIP-pe
2016-06-06 09:47:25 +09:00
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux into next
2016-07-07 10:15:34 +10:00
cfg80211/wext: fix message ordering
2016-01-29 17:13:43 +01:00
kcm: Use stream parser
2016-08-17 19:36:23 -04:00
net: ipv6: Address selection needs to consider L3 domains
2016-06-17 21:25:29 -07:00
net: Pass kern from net_proto_family.create to sk_alloc
2015-05-11 10:50:17 -04:00
net: lwtunnel: Handle fragmentation
2016-08-30 22:27:18 -07:00
mac80211: Add ieee80211_hw pointer to get_expected_throughput
2016-08-05 14:23:25 +02:00
ieee802154: cleanup WARN_ON for fc fetch
2016-07-08 13:23:12 +02:00
mpls: multipath route support
2015-10-23 06:26:42 -07:00
net/ncsi: Package and channel management
2016-07-19 20:49:17 -07:00
6lowpan: introduce 6lowpan-nd
2016-06-15 20:41:23 -07:00
net: add explicit logging and stat for neighbour table overflow
2015-08-10 13:46:21 -07:00
treewide: replace obsolete _refok by __ref
2016-08-02 17:31:41 -04:00
neigh: Send a notification when DELAY_PROBE_TIME changes
2016-07-05 09:06:29 -07:00
netlabel: Implement CALIPSO config functions for SMACK.
2016-06-27 15:06:18 -04:00
netlink: kill nla_put_u64()
2016-05-16 13:46:23 -04:00
net: wrap sock->sk_cgrp_prioidx and ->sk_classid inside a struct
2015-12-08 22:02:33 -05:00
ieee802154: add netns support
2016-07-08 12:20:57 +02:00
net: ping: make ping_v6_sendmsg static
2016-03-23 22:09:58 -04:00
net_sched: properly handle failure case of tcf_exts_init()
2016-08-22 17:02:31 -07:00
net: sched: convert qdisc linked list to hashtable
2016-08-10 17:19:02 -07:00
pptp: Refactor the struct and macros of PPTP codes
2016-08-15 10:55:53 -07:00
udp: Remove udp_offloads
2016-04-07 16:53:30 -04:00
sock: struct proto hash function may error
2016-02-11 03:54:14 -05:00
inet: reqsk_alloc() needs to take care of dead listeners
2016-04-04 22:11:19 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-04-23 18:51:33 -04:00
net: rtnetlink: add support for the IFLA_STATS_LINK_XSTATS_SLAVE attribute
2016-06-30 06:15:04 -04:00
net: minor optimization in qdisc_qstats_cpu_drop()
2016-08-25 16:45:29 -07:00
unix: correctly track in-flight fds in sending process user_struct
2016-02-08 10:30:42 -05:00
net: snmp: fix 64bit stats on 32bit arches
2016-04-28 11:49:45 -04:00
net: remove clear_sk() method
2016-08-23 23:25:29 -07:00
soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind
2016-01-19 14:44:23 -05:00
kcm: Remove TCP specific references from kcm and strparser
2016-08-28 23:32:41 -04:00
switchdev: Fix return value of switchdev_port_fdb_dump().
2016-09-02 11:00:21 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-08-30 00:54:02 -04:00
inet: add TCP_NEW_SYN_RECV state
2015-03-12 22:58:12 -04:00
inet: remove BUG_ON() in twsk_destructor()
2015-07-09 15:12:20 -07:00
ipv6: add new struct ipcm6_cookie
2016-05-03 16:08:14 -04:00
net: tso: add support for IPv6
2015-10-26 22:24:22 -07:00
net: diag: support SOCK_DESTROY for UDP sockets
2016-08-23 23:12:27 -07:00
vxlan: Add new UDP encapsulation offload type for VXLAN-GPE
2016-06-17 20:23:32 -07:00
net: Remove deprecated tunnel specific UDP offload functions
2016-06-17 20:23:32 -07:00
net: xfrm: kill XFRM_INC_STATS_BH()
2016-04-27 22:48:23 -04:00
00e907127e