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[212.8.243.115]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-477ddf0f433sm10696573f8f.32.2026.07.02.07.05.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jul 2026 07:05:17 -0700 (PDT) Message-ID: <3a288e8df5e253fd2a9707ad08a47fe34106d648.camel@redhat.com> Subject: Re: [PATCH v3 17/17] selftests/verification: Add selftests for deadline and stall monitors From: Gabriele Monaco To: Wen Yang Cc: Nam Cao , Thomas Weissschuh , Tomas Glozar , John Kacur , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org, Steven Rostedt , Shuah Khan , linux-kselftest@vger.kernel.org Date: Thu, 02 Jul 2026 16:05:14 +0200 In-Reply-To: <5ca104ab-cffb-4090-9af6-06d173e8069f@linux.dev> References: <20260625121440.116317-1-gmonaco@redhat.com> <20260625121440.116317-18-gmonaco@redhat.com> <5ca104ab-cffb-4090-9af6-06d173e8069f@linux.dev> Autocrypt: addr=gmonaco@redhat.com; prefer-encrypt=mutual; keydata=mDMEZuK5YxYJKwYBBAHaRw8BAQdAmJ3dM9Sz6/Hodu33Qrf8QH2bNeNbOikqYtxWFLVm0 1a0JEdhYnJpZWxlIE1vbmFjbyA8Z21vbmFjb0BrZXJuZWwub3JnPoiZBBMWCgBBFiEEysoR+AuB3R Zwp6j270psSVh4TfIFAmjKX2MCGwMFCQWjmoAFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4AACgk Q70psSVh4TfIQuAD+JulczTN6l7oJjyroySU55Fbjdvo52xiYYlMjPG7dCTsBAMFI7dSL5zg98I+8 cXY1J7kyNsY6/dcipqBM4RMaxXsOtCRHYWJyaWVsZSBNb25hY28gPGdtb25hY29AcmVkaGF0LmNvb T6InAQTFgoARAIbAwUJBaOagAULCQgHAgIiAgYVCgkICwIEFgIDAQIeBwIXgBYhBMrKEfgLgd0WcK eo9u9KbElYeE3yBQJoymCyAhkBAAoJEO9KbElYeE3yjX4BAJ/ETNnlHn8OjZPT77xGmal9kbT1bC1 7DfrYVISWV2Y1AP9HdAMhWNAvtCtN2S1beYjNybuK6IzWYcFfeOV+OBWRDQ== User-Agent: Evolution 3.60.2 (3.60.2-1.fc44) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: NJLvjPHBZNf9W96ElCBYKaNoH7RBHgO8fkADVoWmeZU_1783001120 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2026-06-29 at 00:58 +0800, Wen Yang wrote: > > +echo nop > monitors/stall/reactors > > +echo 0 > monitors/stall/enable > > + > > +echo 1000 > $THRESHOLD >=20 > A little worried: > If the system had a different value configured before the test ran, > this silently changes system state for anything running after it. Yeah that's a valid concern, I could restore the initial value, but to make= it absolutely safe I should also trap and restore it even if the test exits prematurely (e.g. on failure or signal). It shouldn't add too much complexity. Thanks, Gabriele