linux-kernel - Re: [RFC][PATCH v6 3/5] trace/README: Document objtrace trigger syntax

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Date:   Fri, 17 Dec 2021 09:45:51 +0800
From:   Jeff Xie <xiehuan09@...il.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>, mingo@...hat.com,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH v6 3/5] trace/README: Document objtrace trigger syntax

Hi Masami,

On Thu, Dec 16, 2021 at 11:02 PM Masami Hiramatsu <mhiramat@...nel.org> wrote:
>
> Hi Jeff,
>
> On Tue, 30 Nov 2021 00:49:49 +0800
> Jeff Xie <xiehuan09@...il.com> wrote:
>
> > Add a short description of the use of objtrace trigger.
>
> Please merge this into the [1/5] and [2/5], because the changes of
> "a new feature" and "the existance of the feature which
> kernel indicates" must be atomic.
>
> My recommendation is
>
> - add following line in the first patch
>
>         "\t            objtrace:add:obj[:count][if <filter>]\n"
>
> - and update it as following in the next patch according to the changes
>
>         "\t            objtrace:add:obj[,offset][:type][:count][if <filter>]\n"

I will merge them, Thanks.

>
> Thank you!
>
>
> >
> > Signed-off-by: Jeff Xie <xiehuan09@...il.com>
> > ---
> >  kernel/trace/trace.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> > index 88de94da596b..a84b6813769e 100644
> > --- a/kernel/trace/trace.c
> > +++ b/kernel/trace/trace.c
> > @@ -5590,6 +5590,9 @@ static const char readme_msg[] =
> >       "\t            enable_hist:<system>:<event>\n"
> >       "\t            disable_hist:<system>:<event>\n"
> >  #endif
> > +#ifdef CONFIG_TRACE_OBJECT
> > +     "\t            objtrace:add:obj[,offset][:type][:count][if <filter>]\n"
> > +#endif
> >  #ifdef CONFIG_STACKTRACE
> >       "\t\t    stacktrace\n"
> >  #endif
> > --
> > 2.25.1
> >
>
>
> --
> Masami Hiramatsu <mhiramat@...nel.org>
---
JeffXie