linux/net/appletalk
Eric Dumazet 90ddc4f047 [NET]: move struct proto_ops to const
I noticed that some of 'struct proto_ops' used in the kernel may share
a cache line used by locks or other heavily modified data. (default
linker alignement is 32 bytes, and L1_CACHE_LINE is 64 or 128 at
least)

This patch makes sure a 'struct proto_ops' can be declared as const,
so that all cpus can share all parts of it without false sharing.

This is not mandatory : a driver can still use a read/write structure
if it needs to (and eventually a __read_mostly)

I made a global stubstitute to change all existing occurences to make
them const.

This should reduce the possibility of false sharing on SMP, and
speedup some socket system calls.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-03 13:11:15 -08:00
..
aarp.c [NET]: Kill skb->real_dev 2005-08-29 15:32:25 -07:00
atalk_proc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ddp.c [NET]: move struct proto_ops to const 2006-01-03 13:11:15 -08:00
dev.c [ATALK]: Add alloc_ltalkdev(). 2005-05-05 14:25:59 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sysctl_net_atalk.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00