From: Petr Mladek <pmladek@suse.com>
To: Andrey Grodzovsky <andrey.grodzovsky@crowdstrike.com>
Cc: bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
live-patching@vger.kernel.org, rostedt@goodmis.org,
mbenes@suse.cz, jolsa@kernel.org, mhiramat@kernel.org,
jpoimboe@kernel.org, joe.lawrence@redhat.com,
mark.rutland@arm.com, corbet@lwn.net, stable@vger.kernel.org,
linux-open-source@crowdstrike.com
Subject: Re: [RFC PATCH bpf-next v3 2/2] selftests/livepatch: update test-ftrace.sh for deprecated ftrace_enabled
Date: Tue, 25 Aug 2026 15:12:20 +0200 [thread overview]
Message-ID: <ao2UtL6-HHTZ6trp@pathway.suse.cz> (raw)
In-Reply-To: <20260806153000.4184871-3-andrey.grodzovsky@crowdstrike.com>
On Thu 2026-08-06 11:30:00, Andrey Grodzovsky wrote:
> kernel.ftrace_enabled=0 is now refused on kernels that deprecate the
> knob, so the old disable/reload flow no longer applies there. Probe
> for this with ftrace_disable_supported() and keep the full original
> scenario (disable, fail to load a livepatch, re-enable, load, confirm
> disable is refused while loaded) on kernels where it still works;
> otherwise just confirm the write is refused.
>
> Suggested-by: Steven Rostedt <rostedt@goodmis.org>
> Suggested-by: Joe Lawrence <joe.lawrence@redhat.com>
> Assisted-by: Claude:claude-sonnet-5
> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@crowdstrike.com>
It seems that this has already reached mainline.
Anyway, for record, it looks good and seems to work as expected:
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Best Regards,
Petr
prev parent reply other threads:[~2026-08-25 13:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-06 15:29 [RFC PATCH bpf-next v3 0/2] ftrace: deprecate the ftrace_enabled disable switch Andrey Grodzovsky
2026-08-06 15:29 ` [RFC PATCH bpf-next v3 1/2] ftrace: deprecate disabling via ftrace_enabled sysctl Andrey Grodzovsky
2026-08-06 15:41 ` sashiko-bot
2026-08-06 21:21 ` Song Liu
2026-08-06 21:52 ` Andrey Grodzovsky
2026-08-09 18:32 ` Andrey Grodzovsky
2026-08-24 12:27 ` Miroslav Benes
2026-08-24 12:30 ` Miroslav Benes
2026-08-06 15:30 ` [RFC PATCH bpf-next v3 2/2] selftests/livepatch: update test-ftrace.sh for deprecated ftrace_enabled Andrey Grodzovsky
2026-08-06 21:18 ` Song Liu
2026-08-06 21:45 ` Andrey Grodzovsky
2026-08-07 0:51 ` Steven Rostedt
2026-08-07 7:17 ` Song Liu
2026-08-07 12:42 ` Steven Rostedt
2026-08-07 16:16 ` Song Liu
2026-08-24 12:41 ` Miroslav Benes
2026-08-24 12:41 ` Miroslav Benes
2026-08-25 13:12 ` Petr Mladek [this message]
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