tree b369f8dc55e9d27bbd0b8b4b6843c0736d61b005
parent 821f3eff7cdb9d6c7076effabd46c96c322daed1
author Yuichi Nakamura <ynakam@hitachisoft.jp> 1187924111 +0900
committer James Morris <jmorris@namei.org> 1192575570 +1000

SELinux: tune avtab to reduce memory usage

This patch reduces memory usage of SELinux by tuning avtab. Number of hash
slots in avtab was 32768. Unused slots used memory when number of rules is
fewer. This patch decides number of hash slots dynamically based on number
of rules. (chain length)^2 is also printed out in avtab_hash_eval to see
standard deviation of avtab hash table.

Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>