linux-kernel - Re: [PATCH v4 0/4] tracing: tweaks for generic syscall events

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Message-ID: <20090825214402.GH8215@nowhere>
Date:	Tue, 25 Aug 2009 23:44:04 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Josh Stone <jistone@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Jason Baron <jbaron@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, Li Zefan <lizf@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Jiaying Zhang <jiayingz@...gle.com>,
	Martin Bligh <mbligh@...gle.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: [PATCH v4 0/4] tracing: tweaks for generic syscall events

On Mon, Aug 24, 2009 at 02:43:10PM -0700, Josh Stone wrote:
> This patch series moves the callbacks for the syscall tracepoints to the
> definition site, and adds generic TRACE_EVENTs which capture all syscall
> arguments.
> 
> New in v3:
> - Give the thread flag a more generic name: TIF_SYSCALL_TRACEPOINT.
> - Move the regfuncs to arch-specific files, per Jason's suggestion.
> - Change _WITH_CALLBACK to just _FN, per Ingo's suggestion.
> 
> New in v4:
> - Give the config flag a more generic name: HAVE_SYSCALL_TRACEPOINTS.
> - Undo the arch reorg of the regfuncs, but conditionalize on above.
> 
> 
> Sample trace output:
>         sendmail-974   [000] 55665.464492: sys_enter: NR 14 (1, 7fff60f3af40, 7fff60f3aec0, 8, 0, 7fb1b6a05161)
> 
>         sendmail-974   [000] 55665.464496: sys_exit: NR 14 = 0
> 
>         sendmail-974   [000] 55665.464507: sys_enter: NR 23 (5, 7fff60f3b0d0, 0, 0, 7fff60f3b150, 7fff60f3ef01)
> 
>             sshd-978   [000] 55667.845359: sys_exit: NR 23 = 1
> 
>             sshd-978   [000] 55667.845373: sys_enter: NR 14 (0, 7fffc645ce90, 7fffc645cf10, 8, 0, 101010101010101)
> 
>             sshd-978   [000] 55667.845381: sys_exit: NR 14 = 0
> 
>             sshd-978   [000] 55667.845383: sys_enter: NR 14 (2, 7fffc645cf10, 0, 8, 0, 101010101010101)
> 
>             sshd-978   [000] 55667.845386: sys_exit: NR 14 = 0
> 
>             sshd-978   [000] 55667.845395: sys_enter: NR 0 (3, 7fffc6458f80, 4000, 1, 0, 0)
> 
>             sshd-978   [000] 55667.845478: sys_exit: NR 0 = 48
> 
> 
> Signed-off-by: Josh Stone <jistone@...hat.com>
> Cc: Jason Baron <jbaron@...hat.com>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Li Zefan <lizf@...fujitsu.com>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
> Cc: Jiaying Zhang <jiayingz@...gle.com>
> Cc: Martin Bligh <mbligh@...gle.com>
> Cc: Lai Jiangshan <laijs@...fujitsu.com>
> Cc: Paul Mundt <lethal@...ux-sh.org>


Queued for .32, thanks!


> ---
>  arch/s390/Kconfig                   |    2 +-
>  arch/s390/defconfig                 |    2 +-
>  arch/s390/include/asm/thread_info.h |    4 +-
>  arch/s390/kernel/entry.S            |    2 +-
>  arch/s390/kernel/entry64.S          |    2 +-
>  arch/s390/kernel/ptrace.c           |   12 +++---
>  arch/x86/Kconfig                    |    2 +-
>  arch/x86/configs/i386_defconfig     |    2 +-
>  arch/x86/configs/x86_64_defconfig   |    2 +-
>  arch/x86/include/asm/thread_info.h  |   13 +++---
>  arch/x86/kernel/ptrace.c            |   16 +++----
>  include/linux/tracepoint.h          |   46 +++++++++--------------
>  include/trace/define_trace.h        |    5 ++
>  include/trace/events/syscalls.h     |   70 +++++++++++++++++++++++++++++++++++
>  include/trace/ftrace.h              |    9 ++++
>  include/trace/syscall.h             |   17 --------
>  kernel/trace/Kconfig                |    4 +-
>  kernel/trace/trace_syscalls.c       |   17 ++++----
>  kernel/tracepoint.c                 |   20 ++++++----
> 

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