Eric Dumazet
dbca9b2750
[NET]: change layout of ehash table ...
ehash table layout is currently this one :
First half of this table is used by sockets not in TIME_WAIT state
Second half of it is used by sockets in TIME_WAIT state.
This is non optimal because of for a given hash or socket, the two chain heads
are located in separate cache lines.
Moreover the locks of the second half are never used.
If instead of this halving, we use two list heads in inet_ehash_bucket instead
of only one, we probably can avoid one cache miss, and reduce ram usage,
particularly if sizeof(rwlock_t) is big (various CONFIG_DEBUG_SPINLOCK,
CONFIG_DEBUG_LOCK_ALLOC settings). So we still halves the table but we keep
together related chains to speedup lookups and socket state change.
In this patch I did not try to align struct inet_ehash_bucket, but a future
patch could try to make this structure have a convenient size (a power of two
or a multiple of L1_CACHE_SIZE).
I guess rwlock will just vanish as soon as RCU is plugged into ehash :) , so
maybe we dont need to scratch our heads to align the bucket...
Note : In case struct inet_ehash_bucket is not a power of two, we could
probably change alloc_large_system_hash() (in case it use __get_free_pages())
to free the unused space. It currently allocates a big zone, but the last
quarter of it could be freed. Again, this should be a temporary 'problem'.
Patch tested on ipv4 tcp only, but should be OK for IPV6 and DCCP.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-08 14:16:46 -08:00
[PATCH] hci endianness annotations
2006-12-13 09:05:52 -08:00
[PATCH] tty: switch to ktermios and new framework
2006-12-08 08:28:56 -08:00
[S390]: Add AF_IUCV socket support
2007-02-08 13:51:54 -08:00
[NETFILTER]: NAT: optional source port randomization support
2007-02-08 12:39:17 -08:00
[SCTP]: Correctly handle unexpected INIT-ACK chunk.
2007-01-23 20:25:46 -08:00
[PKT_SCHED]: Kill pkt_act.h inlining.
2006-09-22 14:55:10 -07:00
[TIPC]: endianness annotations
2006-12-02 21:21:08 -08:00
[PKT_SCHED]: Kill pkt_act.h inlining.
2006-09-22 14:55:10 -07:00
[IPV6]: Misc endianness annotations.
2006-12-02 21:22:52 -08:00
[IPSEC]: Use HMAC template and hash interface
2006-09-21 11:46:18 +10:00
[IPV6]: Assorted trivial endianness annotations.
2006-12-02 21:22:50 -08:00
[ATM]: Annotations.
2006-12-02 21:22:55 -08:00
[AX.25]: Fix unchecked ax25_linkfail_register uses
2006-12-17 21:59:11 -08:00
[NET]: Make mangling a checksum (0 -> 0xffff on the wire) explicit.
2006-12-02 21:23:39 -08:00
NetLabel: use the correct CIPSOv4 MLS label limits
2006-12-02 21:24:12 -08:00
[NET]: Reduce sizeof(struct flowi) by 20 bytes.
2006-10-21 20:24:01 -07:00
[DECNET]: cleanups
2006-09-22 14:54:40 -07:00
[NET]: IP header modifier helpers annotations.
2006-12-02 21:23:40 -08:00
[PATCH] slab: remove kmem_cache_t
2006-12-07 08:39:25 -08:00
[IPSEC] esp: Defer output IV initialization to first use.
2006-09-22 15:17:35 -07:00
[NETLINK]: Do precise netlink message allocations where possible
2006-12-02 21:22:11 -08:00
[NET]: Rethink mark field in struct flowi
2006-12-02 21:21:39 -08:00
[GENETLINK]: Add cmd dump completion.
2006-12-02 21:32:09 -08:00
[IPV4]: icmp_send() annotation
2006-09-28 18:01:06 -07:00
[PATCH] ieee80211: WLAN_GET_SEQ_SEQ fix (select correct region)
2007-01-02 20:56:26 -05:00
WorkStruct: make allyesconfig
2006-11-22 14:57:56 +00:00
[IPV6]: Per-interface statistics support.
2006-12-02 21:22:08 -08:00
[TCP]: Restore SKB socket owner setting in tcp_transmit_skb().
2007-01-26 01:04:55 -08:00
[IPV6]: annotate inet6_hashtables
2006-12-02 21:21:10 -08:00
[TCP]: Restore SKB socket owner setting in tcp_transmit_skb().
2007-01-26 01:04:55 -08:00
[NET]: IP header modifier helpers annotations.
2006-12-02 21:23:40 -08:00
[NET]: change layout of ehash table
2007-02-08 14:16:46 -08:00
[IPV4]: annotate inet_lookup() and friends
2006-09-28 18:02:26 -07:00
WorkStruct: Pass the work_struct pointer instead of context data
2006-11-22 14:55:48 +00:00
[IPV4] inet_peer: Group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS
2006-10-20 00:28:35 -07:00
[TCP]: Restore SKB socket owner setting in tcp_transmit_skb().
2007-01-26 01:04:55 -08:00
[IPV6]: Dumb typo in generic csum_ipv6_magic()
2006-12-22 11:12:07 -08:00
[IPV6]: Make fib6_node subtree depend on IPV6_SUBTREES
2006-12-13 16:48:31 -08:00
[IPV6]: Misc endianness annotations.
2006-12-02 21:22:52 -08:00
[IPV4] nl_fib_lookup: Rename fl_fwmark to fl_mark
2006-12-02 21:21:40 -08:00
[NET]: Rethink mark field in struct flowi
2006-12-02 21:21:39 -08:00
[NET]: ipvs checksum annotations.
2006-12-02 21:23:41 -08:00
[CRYPTO] users: Use crypto_comp and crypto_has_*
2006-09-21 11:46:22 +10:00
[NET]: ipconfig and nfsroot annotations
2006-12-02 21:21:09 -08:00
[IPV6] net/ipv6/sit.c: make 2 functions static
2006-12-02 21:26:15 -08:00
[IPV6]: __ipv6_addr_diff() annotations and cleanup.
2006-12-02 21:22:53 -08:00
[IPX]: Annotate and fix IPX checksum
2006-11-05 14:11:25 -08:00
[LLC]: anotations
2006-12-02 21:21:23 -08:00
[IPV6] MIP6: Add receiving mobility header functions through raw socket.
2006-09-22 15:07:01 -07:00
[IPV6]: Misc endianness annotations.
2006-12-02 21:22:52 -08:00
[NET]: Convert hh_lock to seqlock.
2006-12-08 17:19:20 -08:00
Remove all inclusions of <linux/config.h>
2006-10-04 03:38:54 -04:00
NetLabel: convert to an extensibile/sparse category bitmap
2006-12-02 21:31:36 -08:00
[PATCH] severing skbuff.h -> mm.h
2006-12-04 02:00:34 -05:00
[IPv4]: FIB configuration using struct fib_config
2006-09-22 14:55:04 -07:00
[INET]: Change protocol field in struct inet_protosw to u16
2006-12-02 21:30:55 -08:00
[IPV6]: 'info' argument of ipv6 ->err_handler() is net-endian
2006-12-02 21:21:12 -08:00
[PATCH] slab: remove kmem_cache_t
2006-12-07 08:39:25 -08:00
[AX.25]: Fix unchecked rose_add_loopback_neigh uses
2006-12-17 21:59:14 -08:00
[IPV4/IPV6]: Always wait for IPSEC SA resolution in socket contexts.
2007-02-08 12:38:45 -08:00
[NET_SCHED]: Fix endless loops caused by inaccurate qlen counters (part 1)
2006-12-02 21:31:42 -08:00
[SCTP]: Extend /proc/net/sctp/snmp to provide more statistics.
2006-09-22 14:55:16 -07:00
[PATCH] lockdep: annotate nfs/nfsd in-kernel sockets
2006-12-07 08:39:30 -08:00
[TCP]: remove tcp header from tcp_v4_check (take #2 )
2007-02-08 12:38:44 -08:00
[PATCH] slab: remove kmem_cache_t
2006-12-07 08:39:25 -08:00
[NET]: Supporting UDP-Lite (RFC 3828) in Linux
2006-12-02 21:22:46 -08:00
[PATCH] severing skbuff.h -> poll.h
2006-12-04 02:00:31 -05:00
[NET]: Fix assorted misannotations (from md5 and udplite merges).
2006-12-02 21:27:16 -08:00
[X.25]: Adds /proc/sys/net/x25/x25_forward to control forwarding.
2007-02-08 13:34:36 -08:00
[XFRM]: Extension for dynamic update of endpoint address(es)
2007-02-08 13:11:42 -08:00
dbca9b2750