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Tue, 25 Aug 2026 06:12:22 -0700 (PDT) Date: Tue, 25 Aug 2026 15:12:20 +0200 From: Petr Mladek To: Andrey Grodzovsky 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 Message-ID: References: <20260806153000.4184871-1-andrey.grodzovsky@crowdstrike.com> <20260806153000.4184871-3-andrey.grodzovsky@crowdstrike.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > Suggested-by: Joe Lawrence > Assisted-by: Claude:claude-sonnet-5 > Signed-off-by: Andrey Grodzovsky It seems that this has already reached mainline. Anyway, for record, it looks good and seems to work as expected: Reviewed-by: Petr Mladek Tested-by: Petr Mladek Best Regards, Petr