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Wed, 20 Aug 2025 04:56:58 -0700 (PDT) Date: Wed, 20 Aug 2025 13:56:56 +0200 From: Petr Mladek To: Ricardo =?iso-8859-1?Q?B=2E_Marli=E8re?= Cc: Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Joe Lawrence , Shuah Khan , live-patching@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Marcos Paulo de Souza Subject: Re: [PATCH] selftests/livepatch: Ignore NO_SUPPORT line in dmesg Message-ID: References: <20250819-selftests-lp_taint_flag-v1-1-a94a62a47683@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250819-selftests-lp_taint_flag-v1-1-a94a62a47683@suse.com> On Tue 2025-08-19 14:37:01, Ricardo B. Marlière wrote: > Some systems might disable unloading a livepatch and when running tests on > them they fail like the following: > > $ ./run_kselftest.sh -c livepatch > TAP version 13 > 1..8 > # selftests: livepatch: test-livepatch.sh > # TEST: basic function patching ... not ok > # > # --- expected > # +++ result > # @@ -5,6 +5,7 @@ livepatch: 'test_klp_livepatch': starting > # livepatch: 'test_klp_livepatch': completing patching transition > # livepatch: 'test_klp_livepatch': patching complete > # % echo 0 > /sys/kernel/livepatch/test_klp_livepatch/enabled > # +livepatch: attempt to disable live patch test_klp_livepatch, setting > NO_SUPPORT taint flag > # livepatch: 'test_klp_livepatch': initializing unpatching transition > # livepatch: 'test_klp_livepatch': starting unpatching transition > # livepatch: 'test_klp_livepatch': completing unpatching transition > # > # ERROR: livepatch kselftest(s) failed This seems to be a SUSE-specific feature. The upstream kernel does not even know the NO_SUPPORT taint flag. This patch is not for upstream. But we should add it into SUSE kernel sources. Best Regards, Petr