linux/net/sctp
Eric Dumazet 87fb4b7b53 net: more accurate skb truesize
skb truesize currently accounts for sk_buff struct and part of skb head.
kmalloc() roundings are also ignored.

Considering that skb_shared_info is larger than sk_buff, its time to
take it into account for better memory accounting.

This patch introduces SKB_TRUESIZE(X) macro to centralize various
assumptions into a single place.

At skb alloc phase, we put skb_shared_info struct at the exact end of
skb head, to allow a better use of memory (lowering number of
reallocations), since kmalloc() gives us power-of-two memory blocks.

Unless SLUB/SLUB debug is active, both skb->head and skb_shared_info are
aligned to cache lines, as before.

Note: This patch might trigger performance regressions because of
misconfigured protocol stacks, hitting per socket or global memory
limits that were previously not reached. But its a necessary step for a
more accurate memory accounting.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Andi Kleen <ak@linux.intel.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-13 16:05:07 -04:00
..
associola.c sctp: Bundle HEAERTBEAT into ASCONF_ACK 2011-08-24 19:41:13 -07:00
auth.c Fix common misspellings 2011-03-31 11:26:23 -03:00
bind_addr.c net: Remove casts of void * 2011-06-16 23:19:27 -04:00
chunk.c net/sctp: Use pr_fmt and pr_<level> 2010-08-26 14:11:48 -07:00
command.c
debug.c sctp: remove completely unsed EMPTY state 2011-04-20 01:51:03 -07:00
endpointola.c sctp: bail from sctp_endpoint_lookup_assoc() if not bound 2011-04-20 01:51:03 -07:00
input.c net: Remove casts of void * 2011-06-16 23:19:27 -04:00
inqueue.c net/sctp: Use pr_fmt and pr_<level> 2010-08-26 14:11:48 -07:00
ipv6.c sctp: Add Auto-ASCONF support (core). 2011-06-02 02:04:53 -07:00
Kconfig sctp: implement sctp association probing module 2010-04-30 22:41:09 -04:00
Makefile sctp: implement sctp association probing module 2010-04-30 22:41:09 -04:00
objcnt.c net/sctp: Use pr_fmt and pr_<level> 2010-08-26 14:11:48 -07:00
output.c net: sctp: fix checksum marking for outgoing packets 2011-07-14 15:16:31 -07:00
outqueue.c sctp: HEARTBEAT negotiation after ASCONF 2011-08-24 19:41:09 -07:00
primitive.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
probe.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-10-23 11:47:02 -07:00
proc.c net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
protocol.c net: more accurate skb truesize 2011-10-13 16:05:07 -04:00
sm_make_chunk.c sctp: Bundle HEAERTBEAT into ASCONF_ACK 2011-08-24 19:41:13 -07:00
sm_sideeffect.c sctp: deal with multiple COOKIE_ECHO chunks 2011-09-16 17:17:22 -04:00
sm_statefuns.c Merge branch 'master' of github.com:davem330/net 2011-09-22 03:23:13 -04:00
sm_statetable.c sctp: Enforce retransmission limit during shutdown 2011-07-07 14:08:44 -07:00
socket.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-14 07:56:40 -07:00
ssnmap.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sysctl.c sctp: Add sysctl support for Auto-ASCONF. 2011-06-02 02:04:53 -07:00
transport.c sctp: Store a flowi in transports to provide persistent keying. 2011-05-08 14:05:14 -07:00
tsnmap.c sctp: fix compile warnings in sctp_tsnmap_num_gabs 2011-02-20 11:10:15 -08:00
ulpevent.c sctp: ABORT if receive, reassmbly, or reodering queue is not empty while closing socket 2011-07-08 09:53:08 -07:00
ulpqueue.c Fix common misspellings 2011-03-31 11:26:23 -03:00