On Sun, Mar 31, 2019 at 4:53 PM Xin Long <lucien....@gmail.com> wrote:
>
> sctp memory accounting is added in this patchset by using
> these kernel APIs on send side:
>
> - sk_mem_charge()
> - sk_mem_uncharge()
> - sk_wmem_schedule()
> - sk_under_memory_pressure()
> - sk_mem_reclaim()
>
> and these on receive side:
>
> - sk_mem_charge()
> - sk_mem_uncharge()
> - sk_rmem_schedule()
> - sk_under_memory_pressure()
> - sk_mem_reclaim()
>
> With sctp memory accounting, we can limit the memory allocation by
> either sysctl:
>
> # sysctl -w net.sctp.sctp_mem="10 20 50"
>
> or cgroup:
>
> # echo $((8<<14)) > \
> /sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes
>
> When the socket is under memory pressure, the send side will block
> and wait, while the receive side will renege or drop.
>
> Xin Long (2):
> sctp: implement memory accounting on tx path
> sctp: implement memory accounting on rx path
>
> include/net/sctp/sctp.h | 2 +-
> net/sctp/sm_statefuns.c | 6 ++++--
> net/sctp/socket.c | 10 ++++++++--
> net/sctp/ulpevent.c | 19 ++++++++-----------
> net/sctp/ulpqueue.c | 3 ++-
> 5 files changed, 23 insertions(+), 17 deletions(-)
>
> --
> 2.1.0
>
Reported-by: Matteo Croce <mcr...@redhat.com>
