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([2804:5078:851:4000:58f2:fc97:371f:2]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2c2806bd7ddsm3880114a91.40.2024.06.06.11.28.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jun 2024 11:28:06 -0700 (PDT) Message-ID: <0c3d947f230e2c7b737cffc2b6a326962edd890c.camel@suse.com> Subject: Re: [PATCH] selftests/livepatch: define max test-syscall processes From: Marcos Paulo de Souza To: Ryan Sullivan , live-patching@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jpoimboe@kernel.org, jikos@kernel.org, mbenes@suse.cz, pmladek@suse.com, joe.lawrence@redhat.com, shuah@kernel.org Date: Thu, 06 Jun 2024 15:27:53 -0300 In-Reply-To: <20240606135348.4708-1-rysulliv@redhat.com> References: <20240606135348.4708-1-rysulliv@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.1 (by Flathub.org) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2024-06-06 at 09:53 -0400, Ryan Sullivan wrote: > Define a maximum allowable number of pids that can be livepatched in > test-syscall.sh as with extremely large machines the output from a > large number of processes overflows the dev/kmsg "expect" buffer in > the "check_result" function and causes a false error. >=20 > Reported-by: CKI Project > Signed-off-by: Ryan Sullivan Hi Ryan, is this the same patch that you sent on ? I couldn't spot any changes, and you also didn't tagged a different version for this patch. > --- > =C2=A0tools/testing/selftests/livepatch/test-syscall.sh | 5 ++++- > =C2=A01 file changed, 4 insertions(+), 1 deletion(-) >=20 > diff --git a/tools/testing/selftests/livepatch/test-syscall.sh > b/tools/testing/selftests/livepatch/test-syscall.sh > index b76a881d4013..289eb7d4c4b3 100755 > --- a/tools/testing/selftests/livepatch/test-syscall.sh > +++ b/tools/testing/selftests/livepatch/test-syscall.sh > @@ -15,7 +15,10 @@ setup_config > =C2=A0 > =C2=A0start_test "patch getpid syscall while being heavily hammered" > =C2=A0 > -for i in $(seq 1 $(getconf _NPROCESSORS_ONLN)); do > +NPROC=3D$(getconf _NPROCESSORS_ONLN) > +MAXPROC=3D128 > + > +for i in $(seq 1 $(($NPROC < $MAXPROC ? $NPROC : $MAXPROC))); do > =C2=A0 ./test_klp-call_getpid & > =C2=A0 pids[$i]=3D"$!" > =C2=A0done