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authorFlorian Westphal <fw@strlen.de>2015-06-11 01:34:55 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2015-06-12 14:27:10 +0200
commit482cfc318559e2527dfd8513582d2fdb276e47c2 (patch)
tree66160977937cbc47d024b93806b85475dab1c026 /fs/dcache.c
parent71ae0dff02d756e4d2ca710b79f2ff5390029a5f (diff)
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netfilter: xtables: avoid percpu ruleset duplication
We store the rule blob per (possible) cpu. Unfortunately this means we can waste lot of memory on big smp machines. ipt_entry structure ('rule head') is 112 byte, so e.g. with maxcpu=64 one single rule eats close to 8k RAM. Since previous patch made counters percpu it appears there is nothing left in the rule blob that needs to be percpu. On my test system (144 possible cpus, 400k dummy rules) this change saves close to 9 Gigabyte of RAM. Reported-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'fs/dcache.c')
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