From: Heiko Carstens <hca@linux.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@kernel.org>
Subject: Re: [for-linus][PATCH 5/5] ftrace/samples: Add module to test multi direct modify interface
Date: Thu, 9 Dec 2021 18:50:57 +0100 [thread overview]
Message-ID: <YbJCAVYQZ5cQ9lmv@osiris> (raw)
In-Reply-To: <20211209153223.843082247@goodmis.org>
On Thu, Dec 09, 2021 at 10:29:13AM -0500, Steven Rostedt wrote:
> From: Jiri Olsa <jolsa@redhat.com>
>
> Adding ftrace-direct-multi-modify.ko kernel module that uses
> modify_ftrace_direct_multi API. The core functionality is taken
> from ftrace-direct-modify.ko kernel module and changed to fit
> multi direct interface.
>
> The init function creates kthread that periodically calls
> modify_ftrace_direct_multi to change the trampoline address
> for the direct ftrace_ops. The ftrace trace_pipe then shows
> trace from both trampolines.
>
> Link: https://lkml.kernel.org/r/20211206182032.87248-4-jolsa@kernel.org
>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> ---
> samples/ftrace/Makefile | 1 +
> samples/ftrace/ftrace-direct-multi-modify.c | 152 ++++++++++++++++++++
> 2 files changed, 153 insertions(+)
> create mode 100644 samples/ftrace/ftrace-direct-multi-modify.c
FWIW, for the s390 bits in here:
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Heiko Carstens <hca@linux.ibm.com>
next prev parent reply other threads:[~2021-12-09 17:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-09 15:29 [for-linus][PATCH 0/5] tracing: Updates for 5.16-rc5 Steven Rostedt
2021-12-09 15:29 ` [for-linus][PATCH 1/5] tracefs: Have new files inherit the ownership of their parent Steven Rostedt
2021-12-09 15:29 ` [for-linus][PATCH 2/5] tracefs: Set all files to the same group ownership as the mount option Steven Rostedt
2021-12-09 15:29 ` [for-linus][PATCH 3/5] ftrace: Use direct_ops hash in unregister_ftrace_direct Steven Rostedt
2021-12-09 15:29 ` [for-linus][PATCH 4/5] ftrace: Add cleanup to unregister_ftrace_direct_multi Steven Rostedt
2021-12-09 15:29 ` [for-linus][PATCH 5/5] ftrace/samples: Add module to test multi direct modify interface Steven Rostedt
2021-12-09 17:50 ` Heiko Carstens [this message]
2021-12-09 18:01 ` Steven Rostedt
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