Re: [PATCH] sched, trace: Fix prev_state output in sched_switch tracepoint

From: Pavan Kondeti
Date: Tue Nov 27 2018 - 04:34:43 EST

Hi Peter/Thomas,

On Tue, Oct 30, 2018 at 12:25 PM Pavankumar Kondeti
<pkondeti@xxxxxxxxxxxxxx> wrote:
> commit 3f5fe9fef5b2 ("sched/debug: Fix task state recording/printout")
> tried to fix the problem introduced by a previous commit efb40f588b43
> ("sched/tracing: Fix trace_sched_switch task-state printing"). However
> the prev_state output in sched_switch is still broken.
> task_state_index() uses fls() which considers the LSB as 1. Left
> shifting 1 by this value gives an incorrect mapping to the task state.
> Fix this by decrementing the value returned by __get_task_state()
> before shifting.
> Fixes: 3f5fe9fef5b2 ("sched/debug: Fix task state recording/printout")
> Signed-off-by: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx>
> ---
> include/trace/events/sched.h | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)

Can you please review this patch?

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