linux-kernel - Re: [PATCH 4/8] stack_tracer: move sysctl registration to kernel/trace/trace.c

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Message-ID: <f574knvwbip2hvyvorxcxfjrojd2bblmewvfsv6utivydljrpj@h2cryrh7cojq>
Date: Thu, 6 Mar 2025 11:37:24 +0100
From: Joel Granados <joel.granados@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Kees Cook <kees@...nel.org>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
	Adrian Hunter <adrian.hunter@...el.com>, "Liang, Kan" <kan.liang@...ux.intel.com>, 
	"David S. Miller" <davem@...emloft.net>, Andreas Larsson <andreas@...sler.com>, 
	Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, 
	Alexander Gordeev <agordeev@...ux.ibm.com>, Christian Borntraeger <borntraeger@...ux.ibm.com>, 
	Sven Schnelle <svens@...ux.ibm.com>, Gerald Schaefer <gerald.schaefer@...ux.ibm.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, sparclinux@...r.kernel.org, linux-s390@...r.kernel.org, 
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 4/8] stack_tracer: move sysctl registration to
 kernel/trace/trace.c

On Mon, Mar 03, 2025 at 08:47:32PM -0500, Steven Rostedt wrote:
> On Tue, 18 Feb 2025 10:56:20 +0100
> Joel Granados <joel.granados@...nel.org> wrote:
> 
> > Squash with ftrace:
I'll also fix this little marker that I missed. And I'll not squash it,
as it is now going into trace_stack.c

> > Move stac_tracer_enabled into trace_sysctl_table while keeping the
> > CONFIG_STACK_TRACER ifdef. This is part of a greater effort to move ctl
I'll remove these comments from the commit message

> > tables into their respective subsystems which will reduce the merge
> > conflicts in kerenel/sysctl.c.
> > 
> > Signed-off-by: Joel Granados <joel.granados@...nel.org>
> > ---
> >  kernel/sysctl.c      | 10 ----------
> >  kernel/trace/trace.c |  9 +++++++++
> >  2 files changed, 9 insertions(+), 10 deletions(-)
> > 
> > diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> > index baa250e223a2..dc3747cc72d4 100644
> > --- a/kernel/sysctl.c
> > +++ b/kernel/sysctl.c
> > @@ -68,7 +68,6 @@
> >  
> >  #ifdef CONFIG_X86
> >  #include <asm/nmi.h>
> > -#include <asm/stacktrace.h>
> >  #include <asm/io.h>
> >  #endif
> >  #ifdef CONFIG_SPARC
> > @@ -1674,15 +1673,6 @@ static const struct ctl_table kern_table[] = {
> >  		.proc_handler	= proc_dointvec,
> >  	},
> >  #endif
> > -#ifdef CONFIG_STACK_TRACER
> > -	{
> > -		.procname	= "stack_tracer_enabled",
> > -		.data		= &stack_tracer_enabled,
> > -		.maxlen		= sizeof(int),
> > -		.mode		= 0644,
> > -		.proc_handler	= stack_trace_sysctl,
> > -	},
> > -#endif
> >  #ifdef CONFIG_MODULES
> >  	{
> >  		.procname	= "modprobe",
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> > index abfc0e56173b..17b449f9e330 100644
> > --- a/kernel/trace/trace.c
> > +++ b/kernel/trace/trace.c
> 
> This should go into kernel/trace/trace_stack.c, and remove the #ifdef.
Will send my V2 shortly with this modification.
> 
> -- Steve
> 
> > @@ -166,6 +166,15 @@ static const struct ctl_table trace_sysctl_table[] = {
> >  		.mode		= 0644,
> >  		.proc_handler	= tracepoint_printk_sysctl,
> >  	},
> > +#ifdef CONFIG_STACK_TRACER
> > +	{
> > +		.procname	= "stack_tracer_enabled",
> > +		.data		= &stack_tracer_enabled,
> > +		.maxlen		= sizeof(int),
> > +		.mode		= 0644,
> > +		.proc_handler	= stack_trace_sysctl,
> > +	},
> > +#endif
> >  };
> >  
> >  static int __init init_trace_sysctls(void)
> > 
> 

Thx for the review

Best

-- 

Joel Granados