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fa438ccfdf
linux/net/core
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Eric Dumazet fa438ccfdf [NET]: Keep sk_backlog near sk_lock 
sk_backlog is a critical field of struct sock. (known famous words)

It is (ab)used in hot paths, in particular in release_sock(), tcp_recvmsg(),
tcp_v4_rcv(), sk_receive_skb().

It really makes sense to place it next to sk_lock, because sk_backlog is only
used after sk_lock locked (and thus memory cache line in L1 cache). This
should reduce cache misses and sk_lock acquisition time.

(In theory, we could only move the head pointer near sk_lock, and leaving tail
far away, because 'tail' is normally not so hot, but keep it simple :) )

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:23:27 -07:00
..
datagram.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
dev_mcast.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
dev.c [PATCH] net: Ignore sysfs network device rename bugs. 2007-04-04 08:51:52 -07:00
dst.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ethtool.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
fib_rules.c [NET]: Change "not found" return value for rule lookup 2007-04-02 13:30:51 -07:00
filter.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
flow.c [IPSEC] flow: Fix potential memory leak 2007-01-23 20:25:39 -08:00
gen_estimator.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
gen_stats.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
iovec.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
kmap_skb.h [PATCH] severing skbuff.h -> highmem.h 2006-12-04 02:00:29 -05:00
link_watch.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
Makefile [NET]: The scheduled removal of the frame diverter. 2006-12-02 21:22:23 -08:00
neighbour.c [NET]: Set a separate lockdep class for neighbour table's proxy_queue 2007-04-17 13:13:31 -07:00
net-sysfs.c Merge branch 'gfar' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into upstream 2007-02-17 15:09:59 -05:00
netevent.c [NET]: Network Event Notifier Mechanism. 2006-08-02 13:38:20 -07:00
netpoll.c [NET]: Fix UDP checksum issue in net poll mode. 2007-04-17 13:13:26 -07:00
pktgen.c [PKTGEN]: Add try_to_freeze() 2007-04-12 14:45:32 -07:00
request_sock.c [NET]: Size listen hash tables using backlog hint 2006-12-02 21:21:44 -08:00
rtnetlink.c [PATCH] WE-22 : prevent information leak on 64 bit 2007-03-27 14:10:26 -04:00
scm.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
skbuff.c [NET]: Get rid of alloc_skb_from_cache 2007-04-17 13:13:16 -07:00
sock.c [NET]: Keep sk_backlog near sk_lock 2007-04-25 22:23:27 -07:00
stream.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
sysctl_net_core.c [NET]: The scheduled removal of the frame diverter. 2006-12-02 21:22:23 -08:00
user_dma.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
utils.c [NET] CORE: Fix whitespace errors. 2007-02-10 23:19:25 -08:00
wireless.c [PATCH] WE-22 : prevent information leak on 64 bit 2007-03-27 14:10:26 -04:00