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 6751339B4BF; Wed, 24 Jun 2026 12:16:28 +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=1782303391; cv=none; b=cf5/Q1s79ALh7PuDTDhzIePwGd9+sgcjRiVp8c2J7GaNSa7FQmrmJSsPl4Qp8aJ9ZLSzSty+TpO5WrAxwpIhlROing4ov4dKKFyamvS4FL64nYDcFatBkHF8bfzQL/BHD8Ln8CpbooyRKNlgUVr/4hmH9dxqq1M7rNPSXOn+BkE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782303391; c=relaxed/simple; bh=Z/koWp+0srdGdNiXIFLKjHjgQy8KF6fpx2CacNwS0Ao=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dIQLXM96qroADdeFXlq3FXGL1P4fy5+qZOesmLPyZEHNGgKTto/44gmi1s127D2DA0xPgVqv6XGd2S8cFHPI/TGbGbh+P5Kz8UmZcCFdJMy+3C/NPBX0LWnw5xN2z269I2w0biXL5zYATqilXXhyGzhjPynu0pItd0XxRBBjQeE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AMxrkXFl; 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="AMxrkXFl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AB2461F000E9; Wed, 24 Jun 2026 12:16:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782303388; bh=9z96Le6Wr6hAPTPEul1Uv+AT7vdYuxP94Kb+DjA8ebE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=AMxrkXFljXFj71xEXhEKjZUDvN/1XAMtwpN651XSVLB14l2PO3nPqdgfpG6ll4Cw1 tee9eGxag7vSF4qpBfzOLw/BWz1LFiSHPMyZ5R4abHDBUEWu6NXt4moX/MVQI0CHqq K4/qOwjyUDmZ8gt9q3G80bP9wz7GChssjWXUVxilKjJM6HqTqIsFsKIv8ijEbLwKdb I6oO3E9C+wqxuAAip686M9CW0Mjd08umuSWVHD37ZZV+i3vDL8zJ1w9fORblxjRGDA lyCAxELWsh89rdQbrmgkskKa1p4/C15RDq4rnUyliEuLMP8bcohIkLGtypLR4AOdNj D7pZ1PIQzigiw== Date: Wed, 24 Jun 2026 13:16:16 +0100 From: Will Deacon To: Jinjie Ruan Cc: catalin.marinas@arm.com, tsbogend@alpha.franken.de, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, peterz@infradead.org, 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, menglong8.dong@gmail.com, oupton@kernel.org, yeoreum.yun@arm.com, miko.lenczewski@arm.com, broonie@kernel.org, kevin.brodsky@arm.com, james.clark@linaro.org, yangyicong@hisilicon.com, tabba@google.com, osandov@fb.com, arnd@arndb.de, anshuman.khandual@arm.com, david@kernel.org, akpm@linux-foundation.org, ljs@kernel.org, dev.jain@arm.com, yang@os.amperecomputing.com, chaitanyas.prakash@arm.com, kprateek.nayak@amd.com, chenl311@chinatelecom.cn, sshegde@linux.ibm.com, thorsten.blum@linux.dev, chang.seok.bae@intel.com, tim.c.chen@linux.intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org Subject: Re: [PATCH v3 00/12] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs Message-ID: References: <20260624092537.2916971-1-ruanjinjie@huawei.com> Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260624092537.2916971-1-ruanjinjie@huawei.com> On Wed, Jun 24, 2026 at 05:25:25PM +0800, Jinjie Ruan wrote: > Support for parallel secondary CPU bringup is already utilized by x86, > MIPS, and RISC-V. This patch brings this capability to the arm64 > architecture. > > Introduce CONFIG_HOTPLUG_PARALLEL_SMT to avoid primary SMT threads > to boot first constraint. > > And add a 'cpu' parameter to update_cpu_boot_status() to allow updating > the boot status at a per-CPU granularity during parallel bringup. > > Rework the global `secondary_data` and `__early_cpu_boot_status` accessed > during early boot into per-CPU arrays to allow secondary CPUs to boot > in parallel. > > And reuse `__cpu_logical_map` array in the early boot code in head.S > to resolve each secondary CPU's logical ID concurrently. > > This series includes a subset of the refactoring patches proposed > by Will Deacon, with further adjustments. Sheesh, Jinjie, what are you doing? I said yesterday that I would dust off the old series after the merge window: https://lore.kernel.org/all/ajqYaklhIyvaNLlk@willie-the-truck/ "Please just give me a week or so to rebase my changes and send them out for discussion" but instead, you've posted patches from me that are missing a bunch of fixes that need to be folded back in: https://web.git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/commit/?h=cpu-hotplug&id=2d5b8df5d4e2bbc142e3b4f21cabbca96e3da79d so now you're asking people to review incomplete patches from somebody else. Please just give me the time I asked for. If you want to help out in the meantime, there are plenty of patches that need reviewing... Will