tree 6813f4b0228e1ec26c26c5c56ef980a2a7c0963c
parent 1e3e238e9c4bf9987b19185235cd0cdc21ea038c
author Eric Dumazet <eric.dumazet@gmail.com> 1248923707 +0000
committer David S. Miller <davem@davemloft.net> 1249263316 -0700

neigh: Convert garbage collection from softirq to workqueue

Current neigh_periodic_timer() function is fired by timer IRQ, and
scans one hash bucket each round (very litle work in fact)

As we are supposed to scan whole hash table in 15 seconds, this means
neigh_periodic_timer() can be fired very often. (depending on the number
of concurrent hash entries we stored in this table)

Converting this to a workqueue permits scanning whole table, minimizing
icache pollution, and firing this work every 15 seconds, independantly
of hash table size.

This 15 seconds delay is not a hard number, as work is a deferrable one.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>