tree fe2450679dc217183421e606b3912641545596bd
parent c936e8bd1de2fa50c49e3df6fa5036bf07870b67
author Eric Dumazet <eric.dumazet@gmail.com> 1275316895 +0200
committer Patrick McHardy <kaber@trash.net> 1275316895 +0200

netfilter: xtables: stackptr should be percpu

commit f3c5c1bfd4 (netfilter: xtables: make ip_tables reentrant)
introduced a performance regression, because stackptr array is shared by
all cpus, adding cache line ping pongs. (16 cpus share a 64 bytes cache
line)

Fix this using alloc_percpu()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-By: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>