From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 28AF9CD98F6 for ; Fri, 19 Jun 2026 09:41:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=t2NuC61jQhkLZlTPdr5bUtoaoRRTUEJ6wbF953eCit8=; b=LBf9TD8ZHAdrA9fA2SBBQ6N4L4 GIV1n6Q2h96F0zavpOy9vP4Y7d3g5IaEAgvsTECswDB8ZnoV3WfLnFCOXDAN3TttrI+Mae6AxjVqe CpKvAMaPzTVhipHAbTBYZUNi2tsy2B947Tec86tdQJTEBUPbrRHhrQQDPttIBkp7lnLZb1OFq4FJI eqKX8A1AeIkqKfFCuLBA0OyYlrYW/HiH4iXOVkRqIqwixvECv453yDvKv6oZpcFTlN4jL2E2J4R01 rQ434HjxVSXtLbI8Xy8WGouJC4bDlEtR3q3pPXz7CEQ3+nR3VGEuKY6W/NmYOYX0AI+TzJoqfs7sc OyDtTg0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1waVjH-00000002Emt-2ATx; Fri, 19 Jun 2026 09:41:39 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1waVjG-00000002Emi-38eK; Fri, 19 Jun 2026 09:41:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=t2NuC61jQhkLZlTPdr5bUtoaoRRTUEJ6wbF953eCit8=; b=dxCpgYGotPMuA2p6gEibYEHVV3 8SYC4JMjwV+Fla0Xbzblgh7OCk7snf4aoCvaL5fNDG1m4tQ79ZMZwNdPBvHgv8y6ajbc5f4/YGSBe S+O32/eTHR97OKvqdgmMKFQkz9w9zmr2vicnDrlCXPgw4ny9YEgreZAUVptOUKQRahCKBiWhDqhKf DSydSwO1kiClKiV4gxdwM4tbiPbercmFalG6w05YvAdx8SRHtNtjt7KI06YAtlWP/SWqW+Fkeb+lY X11FaOOKvHvtRfRMcwjrTl8Wgp2VigJeehKMWCaxutPrahrO+YGN+skUyaUbsvocqspsIA7etIWC5 Izg8KwdA==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.99.2 #2 (Red Hat Linux)) id 1waVjA-0000000EM2X-2Lb1; Fri, 19 Jun 2026 09:41:32 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 795F6300CB5; Fri, 19 Jun 2026 11:41:30 +0200 (CEST) Date: Fri, 19 Jun 2026 11:41:30 +0200 From: Peter Zijlstra To: Thomas Gleixner Cc: Jinjie Ruan , catalin.marinas@arm.com, will@kernel.org, tsbogend@alpha.franken.de, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, kees@kernel.org, nathan@kernel.org, linusw@kernel.org, ojeda@kernel.org, david.kaplan@amd.com, lukas.bulwahn@redhat.com, ryan.roberts@arm.com, maz@kernel.org, timothy.hayes@arm.com, lpieralisi@kernel.org, thuth@redhat.com, oupton@kernel.org, yeoreum.yun@arm.com, miko.lenczewski@arm.com, broonie@kernel.org, kevin.brodsky@arm.com, james.clark@linaro.org, tabba@google.com, mrigendra.chaubey@gmail.com, arnd@arndb.de, anshuman.khandual@arm.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH RFC 1/3] cpu/hotplug: Introduce CONFIG_PARALLEL_SMT_PRIMARY_FIRST Message-ID: <20260619094130.GU49951@noisy.programming.kicks-ass.net> References: <20260611133809.3854977-1-ruanjinjie@huawei.com> <20260611133809.3854977-2-ruanjinjie@huawei.com> <87a4srdgk0.ffs@fw13> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87a4srdgk0.ffs@fw13> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jun 18, 2026 at 05:17:03PM +0200, Thomas Gleixner wrote: > Something simple like the uncompiled below should just work, no? > > --- > --- a/arch/Kconfig > +++ b/arch/Kconfig > @@ -102,6 +102,10 @@ config HOTPLUG_PARALLEL > bool > select HOTPLUG_SPLIT_STARTUP > > +config HOTPLUG_PARALLEL_SMT > + bool > + select HOTPLUG_PARALLEL depends on ARCH_SUPPORTS_SCHED_SMT ?