From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 24 Mar 2009 03:03:01 +0000 (+0800)
Subject: ftrace: show virtual PID
X-Git-Tag: v2.6.30-rc1~2^2~13^3~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc59c9e8d0165c632fd056c4a23e36f917507fb4;p=pandora-kernel.git

ftrace: show virtual PID

Impact: fix PID output under namespaces

When current namespace is not the global namespace,
pid read from set_ftrace_pid is no correct.

 # ~/newpid_namespace_run bash
 # echo $$
 1
 # echo 1 > set_ftrace_pid
 # cat set_ftrace_pid
 3756

Since we write virtual PID to set_ftrace_pid, we need get
virtual PID when we read it.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <49C84D65.9050606@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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