From: Satoru Moriya <satoru.moriya@hds.com>
Date: Fri, 17 Jun 2011 12:00:03 +0000 (+0000)
Subject: core: add tracepoints for queueing skb to rcvbuf
X-Git-Tag: v3.1-rc1~316^2~374
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3847ce32aea9fdf56022de132000e8cf139042eb;p=pandora-kernel.git

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>
---

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