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Date: Sun, 31 Mar 2019 16:56:40 +0800 From: Xin Long <lucien.xin@...il.com> To: network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org Cc: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>, Neil Horman <nhorman@...driver.com>, davem <davem@...emloft.net>, Matteo Croce <mcroce@...hat.com>, Vladis Dronov <vdronov@...hat.com> Subject: Re: [PATCH net-next 0/2] sctp: fully support memory accounting Simple tests are as attached. On Sun, Mar 31, 2019 at 4:53 PM Xin Long <lucien.xin@...il.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 > View attachment "sysctl_sockets_memctl.sh" of type "text/x-sh" (1473 bytes) View attachment "cgroup_sockets_memctl.sh" of type "text/x-sh" (2076 bytes)
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