From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Sat, 6 Dec 2008 02:43:41 +0000 (+0100)
Subject: tracing/function-graph-tracer: append the tracing_graph_flag
X-Git-Tag: v2.6.29-rc1~586^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=380c4b1411ccd6885f92b2c8ceb08433a720f44e;p=pandora-kernel.git

tracing/function-graph-tracer: append the tracing_graph_flag

Impact: Provide a way to pause the function graph tracer

As suggested by Steven Rostedt, the previous patch that prevented from
spinlock function tracing shouldn't use the raw_spinlock to fix it.
It's much better to follow lockdep with normal spinlock, so this patch
adds a new flag for each task to make the function graph tracer able
to be paused. We also can send an ftrace_printk whithout worrying of
the irrelevant traced spinlock during insertion.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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