- 23 May, 2008 40 commits
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Steven Rostedt authored
printk called from wakeup critical timings and irqs off can cause deadlocks since printk might do a wakeup itself. If the call to printk happens with the runqueue lock held, it can deadlock. This patch protects the printk from being called in trace irqs off with a test to see if the runqueue for the current CPU is locked. If it is locked, the printk is skipped. The wakeup always holds the runqueue lock, so the printk is simply removed. Signed-off-by:
Steven Rostedt <srostedt@redhat.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Steven Rostedt authored
trace_function is called by mcount and calling wake_up from that can have unpredictable results. This patch removes the wakeup from trace_function. Signed-off-by:
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Ingo Molnar authored
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Peter Zijlstra authored
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Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Peter Zijlstra authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
now that we have a kbuild method for notrace, no need to pollute the C code with the annotations. Signed-off-by:
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Ingo Molnar authored
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Steven Rostedt authored
Most archs define the string and memory compare functions in assembly. Some do not. But these functions may be used in some archs at early boot up. Since most archs define this code in assembly and they are not usually traced, there's no need to trace them when they are not defined in assembly. This patch removes the -pg from the CFLAGS for lib/string.o. This prevents the string functions use in either vdso or early bootup from crashing the system. Signed-off-by:
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Steven Rostedt authored
PowerPC is very fragile when it comes to use of function names and function addresses. ftrace needs to either use all function addresses or function names (i.e. my_func as suppose to &my_func). This patch chooses to use the names and not the addresses, and makes ftrace consistent. Signed-off-by:
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Ingo Molnar authored
clean up recent code. Signed-off-by:
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Steven Rostedt authored
A new check was added in the ftrace function that wont trace if the CPU trace buffer is disabled. Unfortunately, other tracers used ftrace() to write to the buffer after they disabled it. The new disable check makes these calls into a nop. This patch changes the __ftrace that is called without the check into a new api for the other tracers to use, called "trace_function". The other tracers use this interface instead when the trace CPU buffer is already disabled. Signed-off-by:
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Soeren Sandmann Pedersen authored
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Ingo Molnar authored
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Ingo Molnar authored
no need to backmerge, only affects ftrace-enabled kernels. (which is not the default) Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
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Ingo Molnar authored
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Steven Rostedt authored
This patch is the correct way to have tracing enabled by default. Signed-off-by:
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Steven Rostedt authored
Since ftrace touches practically every function. If we detect any anomaly, we want to fully disable ftrace. This patch adds code to try shutdown ftrace as much as possible without doing any more harm is something is detected not quite correct. This only kills ftrace, this patch does have checks for other parts of the tracer (irqsoff, wakeup, etc.). Signed-off-by:
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Steven Rostedt authored
The ftrace dynamic function update allocates a record to store the instruction pointers that are being modified. If the modified instruction pointer fails to update, then the record is marked as failed and nothing more is done. Worse, if the modification fails, but the record ip function is still called, it will allocate a new record and try again. In just a matter of time, will this cause a serious memory leak and crash the system. This patch plugs this memory leak. When a record fails, it is included back into the pool of records to be used. Now a record may fail over and over again, but the number of allocated records will not increase. Signed-off-by:
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Steven Rostedt authored
Some fixes for better output with the trace pipe. Signed-off-by:
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Ingo Molnar authored
should be an irq-safe lock ... Signed-off-by:
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Ingo Molnar authored
for ad-hoc tracing. Signed-off-by:
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Ingo Molnar authored
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