This short series prepares tcp_get_info() for more detailed infos. In order to not slow down fast path, our goal is to use the normal socket spinlock instead of custom synchronization.
All we need to ensure is that tcp_get_info() is not called with ehash lock, which might dead lock, since packet processing would acquire the spinlocks in reverse way. Eric Dumazet (2): tcp: shortcut listeners in get_tcp_info() tcp: no longer hold ehash lock while calling tcp_get_info() include/linux/tcp.h | 2 -- net/ipv4/inet_diag.c | 48 +++++++++++++++++++++++++++++-------------- net/ipv4/tcp.c | 57 ++++++++++++++++++++++++++++------------------------ net/ipv4/tcp_input.c | 4 ---- 4 files changed, 64 insertions(+), 47 deletions(-) -- 2.8.0.rc3.226.g39d4020
