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authorSteven Rostedt <srostedt@redhat.com>2008-11-05 16:05:44 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-06 01:50:57 -0500
commit0f04870148ecb825133bc2733f473b1c5773ac0b (patch)
tree81399b7b9535d11ac6120366fc01fd051118226a /include/linux
parent60a7ecf42661f2b22168751298592da6ee210c9e (diff)
ftrace: soft tracing stop and start
Impact: add way to quickly start stop tracing from the kernel This patch adds a soft stop and start to the trace. This simply disables function tracing via the ftrace_disabled flag, and disables the trace buffers to prevent recording. The tracing code may still be executed, but the trace will not be recorded. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/ftrace.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 794ab907dbfe..7a75fc6d41f4 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -216,6 +216,9 @@ static inline void __ftrace_enabled_restore(int enabled)
216#ifdef CONFIG_TRACING 216#ifdef CONFIG_TRACING
217extern int ftrace_dump_on_oops; 217extern int ftrace_dump_on_oops;
218 218
219extern void tracing_start(void);
220extern void tracing_stop(void);
221
219extern void 222extern void
220ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); 223ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
221 224
@@ -246,6 +249,8 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
246static inline int 249static inline int
247ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0))); 250ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0)));
248 251
252static inline void tracing_start(void) { }
253static inline void tracing_stop(void) { }
249static inline int 254static inline int
250ftrace_printk(const char *fmt, ...) 255ftrace_printk(const char *fmt, ...)
251{ 256{