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author | Pavel Emelyanov <xemul@parallels.com> | 2012-08-09 01:53:19 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2012-08-10 03:18:07 +0400 |
commit | aa79e66eee5d525e2fcbd2a5fcb87ae3dd4aa9e9 (patch) | |
tree | fd275880600683733adcb1d84477ea35a04dd901 /net/decnet | |
parent | e6f8f1a739b652c56e6f959d6714d92e05621e21 (diff) | |
download | linux-aa79e66eee5d525e2fcbd2a5fcb87ae3dd4aa9e9.tar.xz |
net: Make ifindex generation per-net namespace
Strictly speaking this is only _really_ required for checkpoint-restore to
make loopback device always have the same index.
This change appears to be safe wrt "ifindex should be unique per-system"
concept, as all the ifindex usage is either already made per net namespace
of is explicitly limited with init_net only.
There are two cool side effects of this. The first one -- ifindices of
devices in container are always small, regardless of how many containers
we've started (and re-started) so far. The second one is -- we can speed
up the loopback ifidex access as shown in the next patch.
v2: Place ifindex right after dev_base_seq : avoid two holes and use the
same cache line, dirtied in list_netdevice()/unlist_netdevice()
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/decnet')
0 files changed, 0 insertions, 0 deletions