linux.git/net/ipv4/proc.c, branch v2.6.25

[NETNS][FRAGS]: Make the mem counter per-namespace.

2008-01-28T23:10:36+00:00

This is also simple, but introduces more changes, since
then mem counter is altered in more places.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

[NETNS][FRAGS]: Make the nqueues counter per-namespace.

2008-01-28T23:10:35+00:00

This is simple - just move the variable from struct inet_frags
to struct netns_frags and adjust the usage appropriately.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

[NET]: prot_inuse cleanups and optimizations

2008-01-28T23:00:36+00:00

1) Cleanups (all functions are prefixed by sock_prot_inuse)

sock_prot_inc_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_dec_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_inuse()       -> sock_prot_inuse_get()

New functions :

sock_prot_inuse_init() and sock_prot_inuse_free() to abstract pcounter use.

2) if CONFIG_PROC_FS=n, we can zap 'inuse' member from "struct proto",
since nobody wants to read the inuse value.

This saves 1372 bytes on i386/SMP and some cpu cycles.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

[UDP]: Add memory accounting.

2008-01-28T23:00:19+00:00

Signed-off-by: Takahiro Yasui 
Signed-off-by: Hideo Aoki 
Signed-off-by: David S. Miller

[IPV4]: Switch users of ipv4_devconf(_all) to use the pernet one

2008-01-28T22:58:12+00:00

These are scattered over the code, but almost all the
"critical" places already have the proper struct net
at hand except for snmp proc showing function and routing
rtnl handler.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

[NET]: Define infrastructure to keep 'inuse' changes in an efficent SMP/NUMA way.

2007-11-07T12:08:57+00:00

"struct proto" currently uses an array stats[NR_CPUS] to track change on
'inuse' sockets per protocol.

If NR_CPUS is big, this means we use a big memory area for this.
Moreover, all this memory area is located on a single node on NUMA
machines, increasing memory pressure on the boot node.

In this patch, I tried to :

- Keep a fast !CONFIG_SMP implementation
- Keep a fast CONFIG_SMP implementation for often used protocols
(tcp,udp,raw,...)
- Introduce a NUMA efficient implementation

Some helper macros are defined in include/net/sock.h
These macros take into account CONFIG_SMP

If a "struct proto" is declared without using DEFINE_PROTO_INUSE /
REF_PROTO_INUSE
macros, it will automatically use a default implementation, using a
dynamically allocated percpu zone.
This default implementation will be NUMA efficient, but might use 32/64
bytes per possible cpu
because of current alloc_percpu() implementation.
However it still should be better than previous implementation based on
stats[NR_CPUS] field.

When a "struct proto" is changed to use the new macros, we use a single
static "int" percpu variable,
lowering the memory and cpu costs, still preserving NUMA efficiency.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

[IPv4] SNMP: Refer correct memory location to display ICMP out-going statistics

2007-10-30T05:37:36+00:00

While displaying ICMP out-going statistics as Out counters in
/proc/net/snmp, the memory location for ICMP in-coming statistics
was referred by mistake.

Signed-off-by: Mitsuru Chinen 
Acked-by: David L Stevens 
Signed-off-by: David S. Miller

[IPV4]: Remove no longer used snmp4_icmp_list.

2007-10-26T01:40:05+00:00

This was obsoleted by a previous change, but the removal was
forgotten.

Reported by David Howells and David Stevens.

Signed-off-by: David S. Miller

[INET]: Collect frag queues management objects together

2007-10-15T19:26:39+00:00

There are some objects that are common in all the places
which are used to keep track of frag queues, they are:

 * hash table
 * LRU list
 * rw lock
 * rnd number for hash function
 * the number of queues
 * the amount of memory occupied by queues
 * secret timer

Move all this stuff into one structure (struct inet_frags)
to make it possible use them uniformly in the future. Like
with the previous patch this mostly consists of hunks like

-    write_lock(&ipfrag_lock);
+    write_lock(&ip4_frags.lock);

To address the issue with exporting the number of queues and
the amount of memory occupied by queues outside the .c file
they are declared in, I introduce a couple of helpers.

Signed-off-by: Pavel Emelyanov 
Signed-off-by: David S. Miller

[NET]: sparse warning fixes

2007-10-10T23:54:48+00:00

Fix a bunch of sparse warnings. Mostly about 0 used as
NULL pointer, and shadowed variable declarations.
One notable case was that hash size should have been unsigned.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller