This patch series provide a new mmap_hook to fs willing to grab a mutex before mm->mmap_sem is taken, to ensure lockdep sanity.
This hook allows us to shorten tcp_mmap() execution time (while mmap_sem is held), and improve multi-threading scalability. Eric Dumazet (4): mm: provide a mmap_hook infrastructure net: implement sock_mmap_hook() tcp: provide tcp_mmap_hook() tcp: mmap: move the skb cleanup to tcp_mmap_hook() include/linux/fs.h | 6 ++++++ include/linux/net.h | 1 + include/net/tcp.h | 1 + mm/util.c | 19 ++++++++++++++++++- net/ipv4/af_inet.c | 1 + net/ipv4/tcp.c | 39 ++++++++++++++++++++++++++++++--------- net/ipv6/af_inet6.c | 1 + net/socket.c | 9 +++++++++ 8 files changed, 67 insertions(+), 10 deletions(-) -- 2.17.0.484.g0c8726318c-goog
