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72a3effaf6
linux/include/net
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Eric Dumazet 72a3effaf6 [NET]: Size listen hash tables using backlog hint 
We currently allocate a fixed size (TCP_SYNQ_HSIZE=512) slots hash table for
each LISTEN socket, regardless of various parameters (listen backlog for
example)

On x86_64, this means order-1 allocations (might fail), even for 'small'
sockets, expecting few connections. On the contrary, a huge server wanting a
backlog of 50000 is slowed down a bit because of this fixed limit.

This patch makes the sizing of listen hash table a dynamic parameter,
depending of :
- net.core.somaxconn tunable (default is 128)
- net.ipv4.tcp_max_syn_backlog tunable (default : 256, 1024 or 128)
- backlog value given by user application  (2nd parameter of listen())

For large allocations (bigger than PAGE_SIZE), we use vmalloc() instead of
kmalloc().

We still limit memory allocation with the two existing tunables (somaxconn &
tcp_max_syn_backlog). So for standard setups, this patch actually reduce RAM
usage.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-02 21:21:44 -08:00
..
bluetooth [BLUETOOTH]: rfcomm endianness annotations 2006-12-02 21:21:29 -08:00
irda [IrDA]: Memory allocations cleanups 2006-09-28 18:02:48 -07:00
netfilter Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
sctp [SCTP]: Fix receive buffer accounting. 2006-10-11 23:59:44 -07:00
tc_act [PKT_SCHED]: Kill pkt_act.h inlining. 2006-09-22 14:55:10 -07:00
tipc [TIPC]: endianness annotations 2006-12-02 21:21:08 -08:00
act_api.h [PKT_SCHED]: Kill pkt_act.h inlining. 2006-09-22 14:55:10 -07:00
addrconf.h [IPV6] ADDRCONF: Mobile IPv6 Home Address support. 2006-09-22 15:20:29 -07:00
af_unix.h [AF_UNIX]: Kernel memory leak fix for af_unix datagram getpeersec patch 2006-08-02 14:12:06 -07:00
ah.h [IPSEC]: Use HMAC template and hash interface 2006-09-21 11:46:18 +10:00
arp.h [IPV4] net/ipv4/arp.c: trivial annotations 2006-09-28 18:02:14 -07:00
atmclip.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ax25.h [AX.25]: Reference counting for AX.25 routes. 2006-07-03 19:30:18 -07:00
checksum.h
cipso_ipv4.h [NetLabel]: audit fixups due to delayed feedback 2006-09-29 17:05:05 -07:00
compat.h Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
datalink.h
dn_dev.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_fib.h [DECNET]: cleanups 2006-09-22 14:54:40 -07:00
dn_neigh.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_nsp.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_route.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn.h [NET]: Reduce sizeof(struct flowi) by 20 bytes. 2006-10-21 20:24:01 -07:00
dsfield.h [NET]: annotate dsfield.h 2006-12-02 21:21:19 -08:00
dst.h [NET]: Annotate dst_ops protocol 2006-09-28 18:02:58 -07:00
esp.h [IPSEC] esp: Defer output IV initialization to first use. 2006-09-22 15:17:35 -07:00
fib_rules.h [NET] rules: Share common attribute validation policy 2006-12-02 21:21:41 -08:00
flow.h [NET]: Rethink mark field in struct flowi 2006-12-02 21:21:39 -08:00
gen_stats.h
genetlink.h [PATCH] Add genetlink utilities for payload length calculation 2006-10-01 00:39:29 -07:00
icmp.h [IPV4]: icmp_send() annotation 2006-09-28 18:01:06 -07:00
ieee80211_crypt.h [PATCH] ieee80211: Add TKIP crypt->build_iv 2006-01-27 17:08:07 -05:00
ieee80211_radiotap.h
ieee80211.h [PATCH] ieee80211: Drop and count duplicate data frames to remove 'replay detected' log messages 2006-12-02 00:11:57 -05:00
ieee80211softmac_wx.h [PATCH] softmac: add SIOCSIWMLME 2006-04-24 16:15:58 -04:00
ieee80211softmac.h [PATCH] softmac: Fix WX and association related races 2006-10-16 20:09:47 -04:00
if_inet6.h [IPV6] ADDRCONF: Convert addrconf_lock to RCU. 2006-09-22 15:20:26 -07:00
inet6_connection_sock.h [IPV6]: annotate inet6_csk_search_req() 2006-12-02 21:21:22 -08:00
inet6_hashtables.h [IPV6]: annotate inet6_hashtables 2006-12-02 21:21:10 -08:00
inet_common.h
inet_connection_sock.h [IPV4]: inet_csk_search_req() annotations 2006-09-28 18:02:15 -07:00
inet_ecn.h [INET]: annotate inet_ecn.h 2006-12-02 21:21:20 -08:00
inet_hashtables.h [IPV4]: annotate inet_lookup() and friends 2006-09-28 18:02:26 -07:00
inet_sock.h [IPV4]: annotate inet_lookup() and friends 2006-09-28 18:02:26 -07:00
inet_timewait_sock.h [NET]: Introduce protocol-specific destructor for time-wait sockets. 2006-10-12 00:00:00 -07:00
inetpeer.h [IPV4] inet_peer: Group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS 2006-10-20 00:28:35 -07:00
ip6_checksum.h
ip6_fib.h [IPV6] ROUTE: Unify RT6_F_xxx and RT6_SELECT_F_xxx flags 2006-09-22 14:55:56 -07:00
ip6_route.h [IPV6]: Remove struct pol_chain. 2006-10-18 19:55:25 -07:00
ip6_tunnel.h
ip_fib.h [IPV4] nl_fib_lookup: Rename fl_fwmark to fl_mark 2006-12-02 21:21:40 -08:00
ip_mp_alg.h [NET]: Rethink mark field in struct flowi 2006-12-02 21:21:39 -08:00
ip_vs.h [IPVS]: Compile fix for annotations in userland. 2006-11-09 20:00:55 -08:00
ip.h [IPV4]: ip_icmp_error() annotations 2006-09-28 18:02:09 -07:00
ipcomp.h [CRYPTO] users: Use crypto_comp and crypto_has_* 2006-09-21 11:46:22 +10:00
ipconfig.h [NET]: ipconfig and nfsroot annotations 2006-12-02 21:21:09 -08:00
ipip.h
ipv6.h [IPV6]: flowlabels are net-endian 2006-12-02 21:21:21 -08:00
ipx.h [IPX]: Annotate and fix IPX checksum 2006-11-05 14:11:25 -08:00
iw_handler.h [PATCH] WE-20 for kernel 2.6.16 2006-03-23 07:12:57 -05:00
lapb.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h [LLC]: add multicast support for datagrams 2006-06-17 21:26:08 -07:00
llc_pdu.h [LLC]: anotations 2006-12-02 21:21:23 -08:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h [LLC]: llc_mac_hdr_init const arguments 2006-03-20 22:59:36 -08:00
mip6.h [IPV6] MIP6: Add receiving mobility header functions through raw socket. 2006-09-22 15:07:01 -07:00
ndisc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
neighbour.h [IPV6] NDISC: Set per-entry is_router flag in Proxy NA. 2006-09-22 15:20:24 -07:00
netdma.h Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
netevent.h [NET]: Network Event Notifier Mechanism. 2006-08-02 13:38:20 -07:00
netlabel.h [PATCH] gfp_t in netlabel 2006-10-15 11:00:58 -07:00
netlink.h [IPV4]: introduce nla_get_be32()/NLA_PUT_BE32() 2006-09-28 17:54:14 -07:00
netrom.h [NETROM]: Eleminate HZ from NET/ROM kernel interfaces 2006-05-03 23:27:47 -07:00
nexthop.h [IPv4]: FIB configuration using struct fib_config 2006-09-22 14:55:04 -07:00
p8022.h
pkt_cls.h
pkt_sched.h [PKT_SCHED]: Fix regression in PSCHED_TADD{,2}. 2006-07-24 12:44:23 -07:00
protocol.h [IPV6]: 'info' argument of ipv6 ->err_handler() is net-endian 2006-12-02 21:21:12 -08:00
psnap.h
raw.h Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
rawv6.h [IPV6]: 'info' argument of ipv6 ->err_handler() is net-endian 2006-12-02 21:21:12 -08:00
red.h [PKT_SCHED] RED: Fix overflow in calculation of queue average 2006-08-04 22:59:51 -07:00
request_sock.h [NET]: Size listen hash tables using backlog hint 2006-12-02 21:21:44 -08:00
rose.h [ROSE]: Eleminate HZ from ROSE kernel interfaces 2006-05-03 23:28:20 -07:00
route.h [IPV4]: route.h annotations 2006-09-28 18:02:10 -07:00
sch_generic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
scm.h [AF_UNIX]: Kernel memory leak fix for af_unix datagram getpeersec patch 2006-08-02 14:12:06 -07:00
slhc_vj.h
snmp.h [SCTP]: Extend /proc/net/sctp/snmp to provide more statistics. 2006-09-22 14:55:16 -07:00
sock.h [BLUETOOTH] lockdep: annotate sk_lock nesting in AF_BLUETOOTH 2006-12-02 21:21:35 -08:00
syncppp.h
tcp_ecn.h [IPV6]: Added GSO support for TCPv6 2006-06-30 14:12:10 -07:00
tcp_states.h
tcp.h [NET]: Size listen hash tables using backlog hint 2006-12-02 21:21:44 -08:00
timewait_sock.h [NET]: Introduce protocol-specific destructor for time-wait sockets. 2006-10-12 00:00:00 -07:00
transp_v6.h
udp.h [UDP]: saddr_cmp function should take const socket pointers 2006-09-22 15:18:23 -07:00
x25.h [X25]: allow ITU-T DTE facilities for x25 2006-03-22 00:01:31 -08:00
x25device.h [X25]: Restore skb->dev setting in x25_type_trans(). 2006-04-09 22:37:18 -07:00
xfrm.h [XFRM]: uninline xfrm_selector_match() 2006-12-02 21:21:36 -08:00