From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Christoph Hellwig <hch@infradead.org>,
Gregory Haskins <ghaskins@novell.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
Thomas Gleixner <tglx@linutronix.de>,
Tim Bird <tim.bird@am.sony.com>, Sam Ravnborg <sam@ravnborg.org>,
"Frank Ch. Eigler" <fche@redhat.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
John Stultz <johnstul@us.ibm.com>,
Arjan van de Ven <arjan@infradead.org>,
Steven Rostedt <srostedt@redhat.com>
Subject: Re: [PATCH 06/20 -v5] add notrace annotations for NMI routines
Date: Wed, 23 Jan 2008 16:31:39 -0500 [thread overview]
Message-ID: <20080123213139.GB2282@Krystal> (raw)
In-Reply-To: <20080123160442.063076557@goodmis.org>
* Steven Rostedt (rostedt@goodmis.org) wrote:
> This annotates NMI functions with notrace. Some tracers may be able
> to live with this, but some cannot. So we turn off NMI tracing.
>
> One solution might be to make a notrace_nmi which would only turn
> off NMI tracing if a trace utility needed it off.
>
Is this still needed with the atomic clocksource read ?
> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
>
> ---
> arch/x86/kernel/nmi_32.c | 2 +-
> arch/x86/kernel/nmi_64.c | 2 +-
> arch/x86/kernel/traps_32.c | 4 ++--
> 3 files changed, 4 insertions(+), 4 deletions(-)
>
> Index: linux-mcount.git/arch/x86/kernel/nmi_32.c
> ===================================================================
> --- linux-mcount.git.orig/arch/x86/kernel/nmi_32.c 2008-01-23 10:26:11.000000000 -0500
> +++ linux-mcount.git/arch/x86/kernel/nmi_32.c 2008-01-23 10:26:53.000000000 -0500
> @@ -323,7 +323,7 @@ EXPORT_SYMBOL(touch_nmi_watchdog);
>
> extern void die_nmi(struct pt_regs *, const char *msg);
>
> -__kprobes int nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)
> +notrace __kprobes int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
> {
>
> /*
> Index: linux-mcount.git/arch/x86/kernel/nmi_64.c
> ===================================================================
> --- linux-mcount.git.orig/arch/x86/kernel/nmi_64.c 2008-01-23 10:26:11.000000000 -0500
> +++ linux-mcount.git/arch/x86/kernel/nmi_64.c 2008-01-23 10:26:53.000000000 -0500
> @@ -314,7 +314,7 @@ void touch_nmi_watchdog(void)
> touch_softlockup_watchdog();
> }
>
> -int __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)
> +notrace __kprobes int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
> {
> int sum;
> int touched = 0;
> Index: linux-mcount.git/arch/x86/kernel/traps_32.c
> ===================================================================
> --- linux-mcount.git.orig/arch/x86/kernel/traps_32.c 2008-01-23 10:26:11.000000000 -0500
> +++ linux-mcount.git/arch/x86/kernel/traps_32.c 2008-01-23 10:26:53.000000000 -0500
> @@ -723,7 +723,7 @@ void __kprobes die_nmi(struct pt_regs *r
> do_exit(SIGSEGV);
> }
>
> -static __kprobes void default_do_nmi(struct pt_regs * regs)
> +static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
> {
> unsigned char reason = 0;
>
> @@ -763,7 +763,7 @@ static __kprobes void default_do_nmi(str
>
> static int ignore_nmis;
>
> -fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
> +notrace fastcall __kprobes void do_nmi(struct pt_regs *regs, long error_code)
> {
> int cpu;
>
>
> --
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2008-01-23 21:31 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-23 16:02 [PATCH 00/20 -v5] mcount and latency tracing utility -v5 Steven Rostedt
2008-01-23 16:02 ` [PATCH 01/20 -v5] printk - dont wakeup klogd with interrupts disabled Steven Rostedt
2008-01-23 17:06 ` Daniel Walker
2008-01-23 17:25 ` Mathieu Desnoyers
2008-01-23 17:49 ` Tim Bird
2008-01-24 10:35 ` Pavel Machek
2008-01-23 17:27 ` Steven Rostedt
2008-01-23 17:32 ` Mathieu Desnoyers
2008-01-23 17:43 ` Daniel Walker
2008-01-23 18:18 ` Steven Rostedt
2008-01-23 18:28 ` Daniel Walker
2008-01-23 18:43 ` Steven Rostedt
2008-01-23 18:50 ` Daniel Walker
2008-01-23 19:59 ` Daniel Walker
2008-01-24 22:42 ` [PATCH] defer printks in irqs Tim Bird
2008-01-24 22:48 ` Peter Zijlstra
2008-01-24 23:23 ` Tim Bird
2008-01-27 6:01 ` Andrew Morton
2008-01-28 21:14 ` Tim Bird
2008-01-24 10:36 ` [PATCH 01/20 -v5] printk - dont wakeup klogd with interrupts disabled Pavel Machek
2008-01-23 16:02 ` [PATCH 02/20 -v5] Add basic support for gcc profiler instrumentation Steven Rostedt
2008-01-23 16:02 ` [PATCH 03/20 -v5] Annotate core code that should not be traced Steven Rostedt
2008-01-23 16:02 ` [PATCH 04/20 -v5] x86_64: notrace annotations Steven Rostedt
2008-01-23 16:02 ` [PATCH 05/20 -v5] add notrace annotations to vsyscall Steven Rostedt
2008-01-23 16:02 ` [PATCH 06/20 -v5] add notrace annotations for NMI routines Steven Rostedt
2008-01-23 21:31 ` Mathieu Desnoyers [this message]
2008-01-23 21:58 ` Steven Rostedt
2008-01-26 5:25 ` Steven Rostedt
2008-01-28 11:51 ` Jan Kiszka
2008-01-28 12:15 ` Steven Rostedt
2008-01-23 16:02 ` [PATCH 07/20 -v5] handle accurate time keeping over long delays Steven Rostedt
2008-01-23 16:02 ` [PATCH 08/20 -v5] initialize the clock source to jiffies clock Steven Rostedt
2008-01-23 16:40 ` Tim Bird
2008-01-23 16:02 ` [PATCH 09/20 -v5] add get_monotonic_cycles Steven Rostedt
2008-01-23 16:02 ` [PATCH 10/20 -v5] add notrace annotations to timing events Steven Rostedt
2008-01-23 16:02 ` [PATCH 11/20 -v5] mcount based trace in the form of a header file library Steven Rostedt
2008-01-23 16:02 ` [PATCH 12/20 -v5] Add context switch marker to sched.c Steven Rostedt
2008-01-23 16:02 ` [PATCH 13/20 -v5] Make the task State char-string visible to all Steven Rostedt
2008-01-23 16:02 ` [PATCH 14/20 -v5] Add tracing of context switches Steven Rostedt
2008-01-23 16:02 ` [PATCH 15/20 -v5] Generic command line storage Steven Rostedt
2008-01-23 16:02 ` [PATCH 16/20 -v5] trace generic call to schedule switch Steven Rostedt
2008-01-23 16:02 ` [PATCH 17/20 -v5] Add marker in try_to_wake_up Steven Rostedt
2008-01-23 16:02 ` [PATCH 18/20 -v5] mcount tracer for wakeup latency timings Steven Rostedt
2008-01-23 16:02 ` [PATCH 19/20 -v5] Trace irq disabled critical timings Steven Rostedt
2008-01-23 16:53 ` Steven Rostedt
2008-01-23 17:11 ` Steven Rostedt
2008-01-23 17:27 ` Frank Ch. Eigler
2008-01-23 17:45 ` Steven Rostedt
2008-01-23 17:54 ` Mathieu Desnoyers
2008-01-23 17:58 ` Peter Zijlstra
2008-01-23 18:25 ` Frank Ch. Eigler
2008-01-23 18:48 ` Steven Rostedt
2008-01-23 21:29 ` Mathieu Desnoyers
2008-01-23 16:02 ` [PATCH 20/20 -v5] trace preempt off " Steven Rostedt
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