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authorEric Dumazet <eric.dumazet@gmail.com>2011-05-19 12:24:16 +0000
committerDavid S. Miller <davem@davemloft.net>2011-05-20 00:33:18 -0400
commit449f4544267e73d5db372971da63634707c32299 (patch)
treeacee6de13f34c179ec46ef7f8a49e66b229f4460 /include
parent034cfe48d0efc248ba4b725e3a94b95e76fbc5d3 (diff)
macvlan: remove one synchronize_rcu() call
When one macvlan device is dismantled, we can avoid one synchronize_rcu() call done after deletion from hash list, since caller will perform a synchronize_net() call after its ndo_stop() call. Add a new netdev->dismantle field to signal this dismantle intent. Reduces RTNL hold time. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Patrick McHardy <kaber@trash.net> CC: Ben Greear <greearb@candelatech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netdevice.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index a134d809125b..ca333e79e10f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1293,7 +1293,9 @@ struct net_device {
NETREG_UNREGISTERED, /* completed unregister todo */
NETREG_RELEASED, /* called free_netdev */
NETREG_DUMMY, /* dummy device for NAPI poll */
- } reg_state:16;
+ } reg_state:8;
+
+ bool dismantle; /* device is going do be freed */
enum {
RTNL_LINK_INITIALIZED,