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authorFlorian Westphal <fw@strlen.de>2021-08-26 15:54:19 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2021-08-30 11:49:54 +0200
commitd532bcd0b2699d84d71a0c71d37157ac6eb3be25 (patch)
treeaf1c997d9ea725f60249456b7b04f0c4500d4305 /net/netfilter/utils.c
parente3245a7b7b34bd2e97f744fd79463add6e9d41f4 (diff)
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netfilter: conntrack: sanitize table size default settings
conntrack has two distinct table size settings: nf_conntrack_max and nf_conntrack_buckets. The former limits how many conntrack objects are allowed to exist in each namespace. The second sets the size of the hashtable. As all entries are inserted twice (once for original direction, once for reply), there should be at least twice as many buckets in the table than the maximum number of conntrack objects that can exist at the same time. Change the default multiplier to 1 and increase the chosen bucket sizes. This results in the same nf_conntrack_max settings as before but reduces the average bucket list length. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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