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| author | David S. Miller <davem@davemloft.net> | 2018-03-29 20:47:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-29 20:47:54 +0300 |
| commit | 038d49baab571800e3077b9d322a004f95c8aa8f (patch) | |
| tree | 9bd5736d380f7c2f6f653671b52a5b206b158192 /include | |
| parent | 906edee91e79af5a348f1ad1b3f9b4b948db3db7 (diff) | |
| parent | 152f253152cc08f5d26ba76659723d2d83b363f8 (diff) | |
| download | linux-038d49baab571800e3077b9d322a004f95c8aa8f.tar.xz | |
Merge branch 'Introduce-net_rwsem-to-protect-net_namespace_list'
Kirill Tkhai says:
====================
Introduce net_rwsem to protect net_namespace_list
The series introduces fine grained rw_semaphore, which will be used
instead of rtnl_lock() to protect net_namespace_list.
This improves scalability and allows to do non-exclusive sleepable
iteration for_each_net(), which is enough for most cases.
scripts/get_maintainer.pl gives enormous list of people, and I add
all to CC.
Note, that this patch is independent of "Close race between
{un, }register_netdevice_notifier and pernet_operations":
https://patchwork.ozlabs.org/project/netdev/list/?series=36495
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rtnetlink.h | 1 | ||||
| -rw-r--r-- | include/net/net_namespace.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index c7d1e4689325..5225832bd6ff 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -37,6 +37,7 @@ extern int rtnl_lock_killable(void); extern wait_queue_head_t netdev_unregistering_wq; extern struct rw_semaphore pernet_ops_rwsem; +extern struct rw_semaphore net_rwsem; #ifdef CONFIG_PROVE_LOCKING extern bool lockdep_rtnl_is_held(void); diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 1ab4f920f109..47e35cce3b64 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -291,6 +291,7 @@ static inline struct net *read_pnet(const possible_net_t *pnet) #endif } +/* Protected by net_rwsem */ #define for_each_net(VAR) \ list_for_each_entry(VAR, &net_namespace_list, list) |