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| author | Eric Dumazet <edumazet@google.com> | 2024-02-09 15:31:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-12 12:17:03 +0000 |
| commit | 1ebb85f9c03de0b66c334de219f224159e24e549 (patch) | |
| tree | 4dc5ebc60fcc3e6bdfa134b20016b41b5c6fa3b1 /net/netfilter/nf_conntrack_core.c | |
| parent | 78c3253f27e579f7f3a1f5c0cb8266693a7b4f41 (diff) | |
| download | linux-1ebb85f9c03de0b66c334de219f224159e24e549.tar.gz | |
netfilter: conntrack: expedite rcu in nf_conntrack_cleanup_net_list
nf_conntrack_cleanup_net_list() is calling synchronize_net()
while RTNL is not held. This effectively calls synchronize_rcu().
synchronize_rcu() is much slower than synchronize_rcu_expedited(),
and cleanup_net() is currently single threaded. In many workloads
we want cleanup_net() to be faster, in order to free memory and various
sysfs and procfs entries as fast as possible.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Jozsef Kadlecsik <kadlec@netfilter.org>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 2e5f3864d353a..90e6bd2c30002 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -2530,7 +2530,7 @@ void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list) * netfilter framework. Roll on, two-stage module * delete... */ - synchronize_net(); + synchronize_rcu_expedited(); i_see_dead_people: busy = 0; list_for_each_entry(net, net_exit_list, exit_list) { |