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Thu, 19 Mar 2026 06:53:35 +0000 (GMT) From: Shrikanth Hegde To: mingo@kernel.org, peterz@infradead.org, vincent.guittot@linaro.org, linux-kernel@vger.kernel.org Cc: sshegde@linux.ibm.com, kprateek.nayak@amd.com, juri.lelli@redhat.com, vschneid@redhat.com, tglx@linutronix.de, dietmar.eggemann@arm.com, frederic@kernel.org, longman@redhat.com Subject: [PATCH 2/2] sched/fair: get this cpu once in find_new_ilb Date: Thu, 19 Mar 2026 12:23:14 +0530 Message-ID: <20260319065314.343932-3-sshegde@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260319065314.343932-1-sshegde@linux.ibm.com> References: <20260319065314.343932-1-sshegde@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: GQqVSZuxZQNfiSohluSFsw7NgkUO0Fo1 X-Proofpoint-GUID: GQqVSZuxZQNfiSohluSFsw7NgkUO0Fo1 X-Authority-Analysis: v=2.4 cv=KYnfcAYD c=1 sm=1 tr=0 ts=69bb9d75 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=gfQPMJu-hSpRr0ZdjbEA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzE5MDA1MSBTYWx0ZWRfX0U8gkx0KCcUy uUZ9dltd7CSWFNIvBl16JpwiL4Na8x02PGrO4Rx9SUVaLkQ2P5r4rw3Bf8TMmumJzgvqMreATvI BwBEMZFqWZyxfEod+LT/O6StKjrdWvnzpxyQbhmIMLNQaIFgC0WN8K9TD5vSp8J/nTxBv1hOlfp IvSRmF/+dYxKl1MH+zZ3OCaWa0LEfF4qedqdc72JPHiZcPn973zHg4lZCfrRf1qMR7ZMXqUexrf 91cXnacJPlQLGUSLImxnqVDom51pW4t0ejEXQZP8Pc97ZKfAeK/YzOxD/+t4y5mXhsAnyb0awBQ 7tmartBV8JO3MKLkr4LYK6cIrT5nH2J/TeZDkusdCWRNjtrdq5xqkuxglUF8E5gUTIKLjH8ox/d ILoBa41iBFcTYiZNrxQ3oVUALe+zsXHdbImLFal9iC6Ob/Ex3bGhnhGSQsq64tgSodJnwErRaRA zTdPYRP+zStOVR3RNUQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-19_01,2026-03-17_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603190051 Content-Type: text/plain; charset="utf-8" smp_processor_id() is pointless to fetch in the loop. Move it out. No functional change. Signed-off-by: Shrikanth Hegde Reviewed-by: K Prateek Nayak Reviewed-by: Mukesh Kumar Chaurasiya (IBM) --- kernel/sched/fair.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 02cca2c7a98d..9e561c1234b2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -12635,11 +12635,11 @@ static inline int on_null_domain(struct rq *rq) */ static inline int find_new_ilb(struct cpumask *cpus) { + int this_cpu =3D smp_processor_id(); int ilb_cpu; =20 for_each_cpu(ilb_cpu, cpus) { - - if (ilb_cpu =3D=3D smp_processor_id()) + if (ilb_cpu =3D=3D this_cpu) continue; =20 if (idle_cpu(ilb_cpu)) --=20 2.43.0