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
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datagram.c
dev.c	RPS: Ensure that an expired hardware filter can be re-added later	2011-10-03 12:14:45 -04:00
dev_addr_lists.c
drop_monitor.c
dst.c
ethtool.c	net: consolidate and fix ethtool_ops->get_settings calling	2011-09-15 17:32:26 -04:00
fib_rules.c	Merge branch 'master' of github.com:davem330/net	2011-09-22 03:23:13 -04:00
filter.c
flow.c	net: Handle different key sizes between address families in flow cache	2011-09-16 17:47:28 -04:00
gen_estimator.c
gen_stats.c
iovec.c
kmap_skb.h
link_watch.c	net: linkwatch: allow vlans to get carrier changes faster	2011-09-15 15:36:34 -04:00
Makefile
neighbour.c	Merge branch 'master' of github.com:davem330/net	2011-09-22 03:23:13 -04:00
net-sysfs.c	net: consolidate and fix ethtool_ops->get_settings calling	2011-09-15 17:32:26 -04:00
net-sysfs.h
net-traces.c
net_namespace.c
netevent.c
netpoll.c	Merge branch 'master' of github.com:davem330/net	2011-09-22 03:23:13 -04:00
pktgen.c
request_sock.c
rtnetlink.c
scm.c	af_unix: dont send SCM_CREDENTIALS by default	2011-09-28 13:29:50 -04:00
secure_seq.c
skbuff.c	net: more accurate skb truesize	2011-10-13 16:05:07 -04:00
sock.c	net: more accurate skb truesize	2011-10-13 16:05:07 -04:00
stream.c
sysctl_net_core.c
timestamping.c
user_dma.c
utils.c