From: Will Deacon <will@kernel.org>
To: Jinjie Ruan <ruanjinjie@huawei.com>
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,
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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
Date: Wed, 24 Jun 2026 13:16:16 +0100 [thread overview]
Message-ID: <ajvKkLw5bL-FT5JC@willie-the-truck> (raw)
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
next prev parent reply other threads:[~2026-06-24 12:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-24 9:25 [PATCH v3 00/12] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 01/12] cpu/hotplug: Introduce CONFIG_HOTPLUG_PARALLEL_SMT Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 02/12] cpu/hotplug: Propagate bring-up status to arch_cpuhp_cleanup_kick_cpu() Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 03/12] arm64: smp: Tidy up smp_prepare_cpus() Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 04/12] arm64: smp: Tidy up cpuinfo init and cpufeature updates Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 05/12] arm64: smp: Defer RCU registration during secondary CPU bringup Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 06/12] arm64: smp: Use generic HOTPLUG_SPLIT_STARTUP machinery for CPU onlining Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 07/12] arm64: cpu_ops: Make 'cpu_operations' pointer global instead of per-cpu Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 08/12] arm64: cpu_ops: Introduce get_secondary_cpu_ops() Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 09/12] arm64: cpufeature: Ensure atomic updates to system_cpucaps bitmap Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 10/12] arm64: smp: Pass CPU ID to update_cpu_boot_status() Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 11/12] arm64: smp: Rework early boot data into per-CPU arrays Jinjie Ruan
2026-06-24 9:25 ` [PATCH v3 12/12] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs Jinjie Ruan
2026-06-24 12:16 ` Will Deacon [this message]
2026-06-24 14:59 ` [PATCH v3 00/12] " Borislav Petkov
2026-06-25 1:34 ` Jinjie Ruan
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