On 2021/10/27 上午10:55, Steven Rostedt wrote:
> On Wed, 27 Oct 2021 10:34:13 +0800
> 王贇 wrote:
>
>> +/*
>> + * Preemption will be enabled (if it was previously enabled).
>> + */
>> static __always_inline void trace_clear_recursion(int bit)
>> {
>> +WARN_ON_ONCE(bit < 0);
>
> Can you send
On Wed, 27 Oct 2021 10:34:13 +0800
王贇 wrote:
> +/*
> + * Preemption will be enabled (if it was previously enabled).
> + */
> static __always_inline void trace_clear_recursion(int bit)
> {
> + WARN_ON_ONCE(bit < 0);
Can you send a v7 without the WARN_ON.
This is an extremely hot path, and
As the documentation explained, ftrace_test_recursion_trylock()
and ftrace_test_recursion_unlock() were supposed to disable and
enable preemption properly, however currently this work is done
outside of the function, which could be missing by mistake.
And since the internal using of trace_test_and
