ftrace: add ftrace_off_permanent

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Impact: add new API to disable all of ftrace on anomalies

It case of a serious anomaly being detected (like something caught by
lockdep) it is a good idea to disable all tracing immediately, without
grabing any locks.

This patch adds ftrace_off_permanent that disables the tracers, function
tracing and ring buffers without a way to enable them again. This should
only be used when something serious has been detected.

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

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Steven Rostedt 2008-11-21 12:59:38 -05:00 • committed by Ingo Molnar

parent e58918ab9d

commit 69bb54ec05

2 changed files with 17 additions and 0 deletions

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2

include/linux/ftrace.h

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15

kernel/trace/trace.c

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