core: add tracepoints for queueing skb to rcvbuf
authorSatoru Moriya <satoru.moriya@hds.com>
Fri, 17 Jun 2011 12:00:03 +0000 (12:00 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 21 Jun 2011 23:06:10 +0000 (16:06 -0700)
commit3847ce32aea9fdf56022de132000e8cf139042eb
tree02edbf97518be8af9a1ce978f7e9fcefdc7e0db1
parent296f7ea75b45913d5e2067baef0812087e0b6eb9
core: add tracepoints for queueing skb to rcvbuf

This patch adds 2 tracepoints to get a status of a socket receive queue
and related parameter.

One tracepoint is added to sock_queue_rcv_skb. It records rcvbuf size
and its usage. The other tracepoint is added to __sk_mem_schedule and
it records limitations of memory for sockets and current usage.

By using these tracepoints we're able to know detailed reason why kernel
drop the packet.

Signed-off-by: Satoru Moriya <satoru.moriya@hds.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/trace/events/sock.h [new file with mode: 0644]
net/core/net-traces.c
net/core/sock.c