Eric Dumazet wrote:
Stephen Hemminger a écrit :
This is an alternative version of ip/ip6/arp tables locking using
per-cpu locks. This avoids the overhead of synchronize_net() during
update but still removes the expensive rwlock in earlier versions.
The idea for this came from an earlier version done by Eric Dumazet.
Locking is done per-cpu, the fast path locks on the current cpu
and updates counters. The slow case involves acquiring the locks on
all cpu's.
The mutex that was added for 2.6.30 in xt_table is unnecessary since
there already is a mutex for xt[af].mutex that is held.
Signed-off-by: Stephen Hemminger <shemminger@xxxxxxxxxx>
---
include/linux/netfilter/x_tables.h | 5 -
net/ipv4/netfilter/arp_tables.c | 112 +++++++++------------------------
net/ipv4/netfilter/ip_tables.c | 123 +++++++++++--------------------------
net/ipv6/netfilter/ip6_tables.c | 119 +++++++++++------------------------
net/netfilter/x_tables.c | 28 --------
5 files changed, 110 insertions(+), 277 deletions(-)
Tested successfuly on my dev machine, thanks Stephen.
Signed-off-by: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Applied, thanks everyone. I'll give it some testing myself and
will send it upstream tonight.
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