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(parent: 8d5b2c0) | patch
rtnetlink: speedup rtnl_dump_ifinfo()
authorEric Dumazet <eric.dumazet@gmail.com>
Sat, 24 Oct 2009 13:13:17 +0000 (06:13 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sat, 24 Oct 2009 13:13:17 +0000 (06:13 -0700)
commit7c28bd0b8ec4d128bd7660671d1b626b0abc471f
treedbde8ba53e2059dbd6cb19aca18133b33112ddf5tree | snapshot
parent8d5b2c084d2e71587e30a6ef528a8a8051e59dcdcommit | diff
rtnetlink: speedup rtnl_dump_ifinfo()

When handling large number of netdevice, rtnl_dump_ifinfo()
is very slow because it has O(N^2) complexity.

Instead of scanning one single list, we can use the 256 sub lists
of the dev_index hash table.

This considerably speedups "ip link" operations

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/net_namespace.h diff | blob | history
net/core/dev.c diff | blob | history
net/core/rtnetlink.c diff | blob | history
Full containers within linux kernel