linux-toradex.git/include/net/icmp.h, branch v3.3.5 Linux kernel for Apalis and Colibri modules ipv4: reduce percpu needs for icmpmsg mibs 2011-11-09T21:04:20+00:00 Eric Dumazet eric.dumazet@gmail.com 2011-11-08T13:04:43+00:00 acb32ba3dee66d58704caeeb8c6ff95f60efdc66 Reading /proc/net/snmp on a machine with a lot of cpus is very expensive (can be ~88000 us). This is because ICMPMSG MIB uses 4096 bytes per cpu, and folding values for all possible cpus can read 16 Mbytes of memory. ICMP messages are not considered as fast path on a typical server, and eventually few cpus handle them anyway. We can afford an atomic operation instead of using percpu data. This saves 4096 bytes per cpu and per network namespace. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Reading /proc/net/snmp on a machine with a lot of cpus is very expensive
(can be ~88000 us).

This is because ICMPMSG MIB uses 4096 bytes per cpu, and folding values
for all possible cpus can read 16 Mbytes of memory.

ICMP messages are not considered as fast path on a typical server, and
eventually few cpus handle them anyway. We can afford an atomic
operation instead of using percpu data.

This saves 4096 bytes per cpu and per network namespace.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
inetpeer: Move ICMP rate limiting state into inet_peer entries. 2011-02-04T23:59:53+00:00 David S. Miller davem@davemloft.net 2011-02-04T23:55:25+00:00 92d8682926342d2b6aa5b2ecc02221e00e1573a0 Like metrics, the ICMP rate limiting bits are cached state about a destination. So move it into the inet_peer entries. If an inet_peer cannot be bound (the reason is memory allocation failure or similar), the policy is to allow. Signed-off-by: David S. Miller <davem@davemloft.net> 
Like metrics, the ICMP rate limiting bits are cached state about
a destination.  So move it into the inet_peer entries.

If an inet_peer cannot be bound (the reason is memory allocation
failure or similar), the policy is to allow.

Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: raw: move struct raw_sock and raw_sk() to include/net/raw.h 2010-04-13T21:49:31+00:00 Patrick McHardy kaber@trash.net 2010-04-13T05:03:18+00:00 f74e49b5613206fb18468bdc9509a1db746aa01b A following patch will use struct raw_sock to store state for ipmr, so having the definitions in icmp.h doesn't fit very well anymore. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net> 
A following patch will use struct raw_sock to store state for ipmr,
so having the definitions in icmp.h doesn't fit very well anymore.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
icmp: move icmp_err_convert[] to .rodata 2010-01-23T09:21:28+00:00 Alexey Dobriyan adobriyan@gmail.com 2010-01-22T10:18:25+00:00 e754834e65220b2b674c55c3b6dfb2fb1a2804d0 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: put icmpmsg statistics on struct net 2008-07-18T11:04:22+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-18T11:04:22+00:00 923c6586b0dc0a00df07a1608185437145a0c68b Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: put icmp statistics on struct net 2008-07-18T11:04:02+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-18T11:04:02+00:00 b60538a0d737609213e4b758881913498d3ff0b4 Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: add struct net to ICMPMSGIN_INC_STATS_BH 2008-07-15T06:05:31+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-15T06:04:00+00:00 f66ac03d497c162c70cd0ccc802ce1777073cdf3 Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: add struct net to ICMPMSGOUT_INC_STATS 2008-07-15T06:05:30+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-15T06:03:35+00:00 903fc1964e746b8d8e2971ea20c89b7aeab8bd9a Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: add struct net to ICMP_INC_STATS_BH 2008-07-15T06:05:29+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-15T06:03:00+00:00 dcfc23cac103b54dbc00a6f52f47656ad5c75844 Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
mib: add struct net to ICMP_INC_STATS 2008-07-15T06:05:28+00:00 Pavel Emelyanov xemul@openvz.org 2008-07-15T06:02:35+00:00 75c939bb4d6da790f758a2a3dcc7432f6d8778ee Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>