kernel-4.19.patch

   1 From 53f9bf806271d7bd38595dfc2eddbeb668eb842e Mon Sep 17 00:00:00 2001
   2 From: Michael Jeanson <mjeanson@efficios.com>
   3 Date: Fri, 7 Sep 2018 12:21:12 -0400
   4 Subject: [PATCH] Fix: net: expose sk wmem in sock_exceed_buf_limit tracepoint
   5  (4.19)
   6
   7 See upstream commit:
   8
   9   commit d6f19938eb031ee2158272757db33258153ae59c
  10   Author: Yafang Shao <laoar.shao@gmail.com>
  11   Date:   Sun Jul 1 23:31:30 2018 +0800
  12
  13     net: expose sk wmem in sock_exceed_buf_limit tracepoint
  14
  15     Currently trace_sock_exceed_buf_limit() only show rmem info,
  16     but wmem limit may also be hit.
  17     So expose wmem info in this tracepoint as well.
  18
  19     Regarding memcg, I think it is better to introduce a new tracepoint(if
  20     that is needed), i.e. trace_memcg_limit_hit other than show memcg info in
  21     trace_sock_exceed_buf_limit.
  22
  23 Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
  24 Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  25 ---
  26  instrumentation/events/lttng-module/sock.h | 23 +++++++++++++++++++++-
  27  1 file changed, 22 insertions(+), 1 deletion(-)
  28
  29 diff --git a/instrumentation/events/lttng-module/sock.h b/instrumentation/events/lttng-module/sock.h
  30 index 4bde039..a1032b3 100644
  31 --- a/instrumentation/events/lttng-module/sock.h
  32 +++ b/instrumentation/events/lttng-module/sock.h
  33 @@ -22,7 +22,28 @@ LTTNG_TRACEPOINT_EVENT(sock_rcvqueue_full,
  34         )
  35  )
  36
  37 -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0))
  38 +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
  39 +
  40 +LTTNG_TRACEPOINT_EVENT(sock_exceed_buf_limit,
  41 +
  42 +       TP_PROTO(struct sock *sk, struct proto *prot, long allocated, int kind),
  43 +
  44 +       TP_ARGS(sk, prot, allocated, kind),
  45 +
  46 +       TP_FIELDS(
  47 +               ctf_string(name, prot->name)
  48 +               ctf_array(long, sysctl_mem, prot->sysctl_mem, 3)
  49 +               ctf_integer(long, allocated, allocated)
  50 +               ctf_integer(int, sysctl_rmem, sk_get_rmem0(sk, prot))
  51 +               ctf_integer(int, rmem_alloc, atomic_read(&sk->sk_rmem_alloc))
  52 +               ctf_integer(int, sysctl_wmem, sk_get_wmem0(sk, prot))
  53 +               ctf_integer(int, wmem_alloc, refcount_read(&sk->sk_wmem_alloc))
  54 +               ctf_integer(int, wmem_queued, sk->sk_wmem_queued)
  55 +               ctf_integer(int, kind, kind)
  56 +       )
  57 +)
  58 +
  59 +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4,15,0))
  60
  61  LTTNG_TRACEPOINT_EVENT(sock_exceed_buf_limit,
  62