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 E6A7CCD4F26 for ; Fri, 19 Jun 2026 19:27:26 +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:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From: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=2j25ksHlzzgiJapOxjE0LWoxXkD8fo4E5hLsMP9g7Qg=; b=T0q8TQXN+Tgon/JBbXRwpcrMZ5 JQZN4itgA8/s6G5zY76+XWP4OqHyB+p2qdgYfeZQNCnJL1hGRDAPlOyvMMi8Qj9gsvXD6fI8zsqbB mEf3nxNfAenGzBqmmGWq0NI/0I/0MCX3ySKHK+Siqar5pW0RdI/TaSTt/+ULrrkRsEdOlhZtlmUvm vSQLbqP8dKSFTkretWy2M6tk2NyTp1Y82g2CVgo7hqR/Wh6DkbvGr2vmVTN8PEDk7Q1s6aCr/pUdt tkU41IDGrOFeRVoMo59nIK5k6TeXOP/H5e5U3f6Y8X0GwdKAIVvOJ6xjhBv0FKeJIj9IkX78/Sfsj a6Jv0orw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1waes2-00000002ura-0NCj; Fri, 19 Jun 2026 19:27:18 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1waes0-00000002urO-2b3R; Fri, 19 Jun 2026 19:27:16 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id A6D434456B; Fri, 19 Jun 2026 19:27:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8AC61F000E9; Fri, 19 Jun 2026 19:27:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781897234; bh=2j25ksHlzzgiJapOxjE0LWoxXkD8fo4E5hLsMP9g7Qg=; h=From:To:Cc:Subject:In-Reply-To:References:Date; b=ZjZWeR2B4RDHzs11keZnbEX5GPkDO4ewLXSWIxWl3TtZgmPrYzh/es7rKmPgwLYPc G9/iS15aNLl8yRhv+nscp6GyPkttdugCDo+n+FCaVUJ+BeFCIYtF+Tz1RzU+56fFhI OredVk3jQFGyG1m9pAcuqeECZVannJ2qU5Wst0Xngngfq0xCdq56Jxq14dM30kX2B8 gRsKlF7lAAdMILqwQRe9JkuVQEHYr2b2MohI3A2GtWVIyLDHkMeHlNd/PDKS9jbNu9 +B+qHCkz1stv2sm/Z5ih0nssJKxSD48jJaDNgnSdRxbHlFulBG38L//Ott12V41Y2X B8d3rWSj0UApA== From: Thomas Gleixner To: Peter Zijlstra 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 In-Reply-To: <20260619094130.GU49951@noisy.programming.kicks-ass.net> References: <20260611133809.3854977-1-ruanjinjie@huawei.com> <20260611133809.3854977-2-ruanjinjie@huawei.com> <87a4srdgk0.ffs@fw13> <20260619094130.GU49951@noisy.programming.kicks-ass.net> Date: Fri, 19 Jun 2026 21:27:11 +0200 Message-ID: <875x3ecovk.ffs@fw13> MIME-Version: 1.0 Content-Type: text/plain 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 Fri, Jun 19 2026 at 11:41, Peter Zijlstra wrote: > 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 ? Probably. Did not think about that as this has to be anyway selected by the architecture.