From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF194414DDB for ; Thu, 8 Oct 2026 08:40:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791448823; cv=none; b=Qa2mPgQETv8nGki4ugA2YIXYMzLkj1MSKqYHL6KJNnu8btuBV5UafjEEblOH9AbR3x7qU1sn47LHaFajaWn2PUPGVb6SLiqNYsl7de6KZutNE2DOrVI3hDmf4Ghwpyc0JKgwficC2622+GGGD8Sm0+y7yi7CtcGKC4DV00lZpac= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791448823; c=relaxed/simple; bh=Z27DfA3GsAY2WKnrNR2avRnafkAudrM6zfdF9S6GffQ=; h=Message-ID:From:Subject:To:Cc:In-Reply-To:References:Content-Type: Date; b=IcKf5Pd/Eu28sVax4V4UiFe2zJ9FFGlpWbS6ZSXhlFbLfPI6BgEuqfb8MUnpxAX16TtZi80LaD6riwBrqe0JxcJZthyfN6sh3xMhZbQE/GViq8PbfT8C/DQTyz39619uPtPToJdFxxEFtrWdarw1Ca2mkaI5eF3bLP0cF5LBRYk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nqXNfFS0; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nqXNfFS0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22FF61F00893; Thu, 8 Oct 2026 08:40:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791448822; bh=Z27DfA3GsAY2WKnrNR2avRnafkAudrM6zfdF9S6GffQ=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=nqXNfFS05iKQm9j5KYl74e+T/bFALChP2cH+3L7hUYbALT5UBnixSZPdrZ7WDbeim gSrJ8zROESdY8v4CEzjYkdJfH2+5OqgafspRtFr8MBJThTKCanbxgLGdR/x97JjIY6 xZ+2Ku8k5RdPDK/b4tWYw6J+5snJUMU+an7lTpkUpNZJSlTTBDWl3bYXnMSD6ozMp4 AyZQVIdZOqKVeb8vxTVooLfj8XtnMyymghmuDh9Bx+uhPxbUteGTUpbbu0KtE6I8LV yt/ifsZ8TscLOJ1z5jmNJ/MaKhuZQMl+xucc/K1rOl9SwlCUjY1bQ6P3f+IZVmdB0b 9gQfv+yCdVkng== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 2/2] s390/topology: Enable SCHED_IDLE_SMT_PRIO Reply-To: sashiko-reviews@lists.linux.dev To: "Mete Durlu" Cc: "Alexander Gordeev" , "Christian Borntraeger" , "Vasily Gorbik" , "Heiko Carstens" , linux-s390@vger.kernel.org In-Reply-To: <20261008-hiperdispatchfix-v1-2-73fe41081070@linux.ibm.com> References: <20261008-hiperdispatchfix-v1-0-73fe41081070@linux.ibm.com> <20261008-hiperdispatchfix-v1-2-73fe41081070@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 08 Oct 2026 08:40:21 +0000 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > On s390, vertical polarization configuration assigns CPUs different > polarization values and capacities. These capacities represent the > virtual runtime being assigned to the shared CPUs by the underlying > hypervisor. Consequently running load on high capacity cores, even if > the SMT sibling (SMT=3D2 on s390) of a given core is busy is more > favorable compared to a fully idle low capacity CPU. >=20 > Implement arch_needs_idle_smt_prio() to enable the sched_idle_smt_prio > static branch when the machine has hardware backed topology. >=20 > Signed-off-by: Mete Durlu Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261008-hiperdispa= tchfix-v1-0-73fe41081070@linux.ibm.com?part=3D2