[NETFILTER]: nf_conntrack: early_drop improvement

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When the maximum number of conntrack entries is reached and a new
one needs to be allocated, conntrack tries to drop an unassured
connection from the same hash bucket the new conntrack would hash
to. Since with a properly sized hash the average number of entries
per bucket is 1, the chances of actually finding one are not very
good. This patch makes it walk the hash until a minimum number of
8 entries are checked.

Based on patch by Vasily Averin <vvs@sw.ru>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Patrick McHardy 2007-07-07 22:37:38 -07:00 • committed by David S. Miller

parent ec59a1110a

commit 7ae7730fd6

1 changed files with 15 additions and 7 deletions

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net/netfilter/nf_conntrack_core.c

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