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    SubjectRe: [PATCH 29/30] Documentation: tracing: add TIF_NEED_RESCHED_LAZY
    On Mon, 12 Feb 2024 21:55:53 -0800
    Ankur Arora <ankur.a.arora@oracle.com> wrote:

    > Document various combinations of resched flags.
    >
    > Cc: Steven Rostedt <rostedt@goodmis.org>
    > Cc: Masami Hiramatsu <mhiramat@kernel.org>
    > Cc: Jonathan Corbet <corbet@lwn.net>
    > Originally-by: Thomas Gleixner <tglx@linutronix.de>
    > Link: https://lore.kernel.org/lkml/87jzshhexi.ffs@tglx/
    > Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
    > ---
    > Documentation/trace/ftrace.rst | 6 +++++-
    > 1 file changed, 5 insertions(+), 1 deletion(-)
    >
    > diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
    > index 7e7b8ec17934..7f20c0bae009 100644
    > --- a/Documentation/trace/ftrace.rst
    > +++ b/Documentation/trace/ftrace.rst
    > @@ -1036,8 +1036,12 @@ explains which is which.
    > be printed here.
    >
    > need-resched:
    > - - 'N' both TIF_NEED_RESCHED and PREEMPT_NEED_RESCHED is set,
    > + - 'B' all three, TIF_NEED_RESCHED, TIF_NEED_RESCHED_LAZY and PREEMPT_NEED_RESCHED are set,
    > + - 'N' both TIF_NEED_RESCHED and PREEMPT_NEED_RESCHED are set,
    > + - 'L' both TIF_NEED_RESCHED_LAZY and PREEMPT_NEED_RESCHED are set,
    > + - 'b' both TIF_NEED_RESCHED and TIF_NEED_RESCHED_LAZY are set,
    > - 'n' only TIF_NEED_RESCHED is set,
    > + - 'l' only TIF_NEED_RESCHED_LAZY is set,
    > - 'p' only PREEMPT_NEED_RESCHED is set,
    > - '.' otherwise.
    >

    I wonder if we should also add this information in /sys/kernel/tracing/README
    so that it is easier to find on a machine.

    -- Steve

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