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authorThomas Graf <tgraf@suug.ch>2014-10-21 22:05:38 +0200
committerDavid S. Miller <davem@davemloft.net>2014-10-21 21:34:49 -0400
commit78fd1d0ab072d4d9b5f0b7c14a1516665170b565 (patch)
treeb71cfdca2eb841bd75355f6d8e29c53739a50ee3 /kernel/bpf
parent1a194c2d59c55c37cb4c0c459d5418071a141341 (diff)
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netlink: Re-add locking to netlink_lookup() and seq walker
The synchronize_rcu() in netlink_release() introduces unacceptable latency. Reintroduce minimal lookup so we can drop the synchronize_rcu() until socket destruction has been RCUfied. Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Reported-by: Steinar H. Gunderson <sgunderson@bigfoot.com> Reported-and-tested-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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