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[212.8.243.115]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a8eba865fsm249488225e9.10.2026.05.04.07.02.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2026 07:02:55 -0700 (PDT) Message-ID: Subject: Re: [RFC PATCH 10/12] rv: Add KUnit tests for some DA/HA monitors From: Gabriele Monaco To: Nam Cao , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Steven Rostedt , Masami Hiramatsu , Thomas Weissschuh , Tomas Glozar , John Kacur , Wen Yang Date: Mon, 04 May 2026 16:02:53 +0200 In-Reply-To: <87v7d38fk3.fsf@yellow.woof> References: <20260427151134.192971-1-gmonaco@redhat.com> <20260427151134.192971-11-gmonaco@redhat.com> <875x531scg.fsf@yellow.woof> <87v7d38fk3.fsf@yellow.woof> Autocrypt: addr=gmonaco@redhat.com; prefer-encrypt=mutual; keydata=mDMEZuK5YxYJKwYBBAHaRw8BAQdAmJ3dM9Sz6/Hodu33Qrf8QH2bNeNbOikqYtxWFLVm0 1a0JEdhYnJpZWxlIE1vbmFjbyA8Z21vbmFjb0BrZXJuZWwub3JnPoiZBBMWCgBBFiEEysoR+AuB3R Zwp6j270psSVh4TfIFAmjKX2MCGwMFCQWjmoAFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4AACgk Q70psSVh4TfIQuAD+JulczTN6l7oJjyroySU55Fbjdvo52xiYYlMjPG7dCTsBAMFI7dSL5zg98I+8 cXY1J7kyNsY6/dcipqBM4RMaxXsOtCRHYWJyaWVsZSBNb25hY28gPGdtb25hY29AcmVkaGF0LmNvb T6InAQTFgoARAIbAwUJBaOagAULCQgHAgIiAgYVCgkICwIEFgIDAQIeBwIXgBYhBMrKEfgLgd0WcK eo9u9KbElYeE3yBQJoymCyAhkBAAoJEO9KbElYeE3yjX4BAJ/ETNnlHn8OjZPT77xGmal9kbT1bC1 7DfrYVISWV2Y1AP9HdAMhWNAvtCtN2S1beYjNybuK6IzWYcFfeOV+OBWRDQ== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2026-05-04 at 15:33 +0200, Nam Cao wrote: > I added that missing RV_KUNIT_EXPECT_REACTION(), but I still see a test > failure: >=20 > [=C2=A0=C2=A0=C2=A0 1.070721]=C2=A0=C2=A0=C2=A0=C2=A0 # module: rv_monito= rs_test > [=C2=A0=C2=A0=C2=A0 1.073512]=C2=A0=C2=A0=C2=A0=C2=A0 1..7 > [=C2=A0=C2=A0=C2=A0 1.077641] scsi 1:0:0:0: CD-ROM=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 QEMU=C2=A0=C2=A0=C2=A0=C2=A0 = QEMU DVD-ROM=C2=A0=C2=A0=C2=A0=C2=A0 2.5+ > PQ: 0 ANSI: 5 > [=C2=A0=C2=A0=C2=A0 1.078494]=C2=A0=C2=A0=C2=A0=C2=A0 ok 1 rv_test_sco > [=C2=A0=C2=A0=C2=A0 1.083256]=C2=A0=C2=A0=C2=A0=C2=A0 ok 2 rv_test_sssw > [=C2=A0=C2=A0=C2=A0 1.085783]=C2=A0=C2=A0=C2=A0=C2=A0 ok 3 rv_test_sts # = SKIP Monitor not enabled > [=C2=A0=C2=A0=C2=A0 1.092365]=C2=A0=C2=A0=C2=A0=C2=A0 ok 4 rv_test_opid > [=C2=A0=C2=A0=C2=A0 1.093462]=C2=A0=C2=A0=C2=A0=C2=A0 # rv_test_nomiss: E= XPECTATION FAILED at > kernel/trace/rv/monitors/nomiss/nomiss.c:306 > [=C2=A0=C2=A0=C2=A0 1.093462]=C2=A0=C2=A0=C2=A0=C2=A0 Expected ctx->react= ions =3D=3D ++ctx->expected, but > [=C2=A0=C2=A0=C2=A0 1.093462]=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 ctx->reactions =3D=3D 2 (0x2) > [=C2=A0=C2=A0=C2=A0 1.093462]=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 ++ctx->expected =3D=3D 1 (0x1) > [=C2=A0=C2=A0=C2=A0 1.095699]=C2=A0=C2=A0=C2=A0=C2=A0 not ok 5 rv_test_no= miss > [=C2=A0=C2=A0=C2=A0 1.109418]=C2=A0=C2=A0=C2=A0=C2=A0 ok 6 rv_test_pagefa= ult # SKIP Monitor not enabled > [=C2=A0=C2=A0=C2=A0 1.115146]=C2=A0=C2=A0=C2=A0=C2=A0 ok 7 rv_test_sleep = # SKIP Monitor not enabled > [=C2=A0=C2=A0=C2=A0 1.118050] # rv_trigger: pass:3 fail:1 skip:3 total:7 > [=C2=A0=C2=A0=C2=A0 1.118053] # Totals: pass:3 fail:1 skip:3 total:7 > [=C2=A0=C2=A0=C2=A0 1.120622] not ok 1 rv_trigger >=20 > Any idea why? The nomiss test is broken, it was not failing by sheer luck, maybe your run= was not lucky. Basically a few silly mistakes like using deadline instead of dl_deadline (= which is left uninitialised) and doing udelay(10 / 1000) (which is 0). I'm going to fix it in V2. > > So I'm actually thinking of defining yet another macro that fundamental= ly > > does > >=20 > > RV_KUNIT_EXPECT_NO_REACTION() > > handle_event() > > RV_KUNIT_EXPECT_REACTION() > >=20 > > which would make sure the reaction happens exactly there, plus I'd add = an > > RV_KUNIT_EXPECT_NO_REACTION() in the cleanup sequence to ensure no > > unexpected > > reaction occurred (or nobody forgot to expect a reaction like I did abo= ve). >=20 > Sounds nice, go for it. >=20 > > Yeah that should be neater, but weren't you the one not liking macros? = ;) >=20 > It's not black and white, I like whatever makes the code clean and easy > to read. Sometimes macros are nice, other times not so much. I have > spent hours reading the tracepoints' macros and they are still black > magic to me (but to be fair, macros are probably the best we can do for > that case). I hope we can rewrite those in Rust's generic one day. Yeah makes sense,=C2=A0tracepoints are a fun one indeed. Rust would probably be black magic to me but I'm going to have to learn it = for good one day! Thanks, Gabriele