On Sun, Mar 31, 2019 at 4:53 PM Xin Long <lucien.xin@xxxxxxxxx> 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 <mcroce@xxxxxxxxxx>
