From: Steven Rostedt <srostedt@redhat.com>
Date: Thu, 4 Dec 2008 05:26:41 +0000 (-0500)
Subject: ftrace: add ability to only trace swapper tasks
X-Git-Tag: v2.6.29-rc1~586^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e32d89569128e76bdf84867be0928902ca9f7555;p=pandora-kernel.git

ftrace: add ability to only trace swapper tasks

Impact: new feature

This patch lets the swapper tasks of all CPUS be filtered by the
set_ftrace_pid file.

If '0' is echoed into this file, then all the idle tasks (aka swapper)
is flagged to be traced.  This affects all CPU idle tasks.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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