From: David Woodhouse <dwmw2@infradead.org>
To: Will Deacon <will@kernel.org>, linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, "Thomas Gleixner" <tglx@kernel.org>,
"Ben Horgan" <ben.horgan@arm.com>,
"Ștefania Ion" <stefion@google.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Pankaj Patil" <pankaj.patil@oss.qualcomm.com>,
"Borislav Petkov" <bp@alien8.de>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Jinjie Ruan" <ruanjinjie@huawei.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Tarun Sahu" <tarunsahu@google.com>,
"Fuad Tabba" <fuad.tabba@linux.dev>,
"Peter Zijlstra" <peterz@infradead.org>,
"Marc Zyngier" <maz@kernel.org>
Subject: Re: [PATCH v2 03/23] cpu/hotplug: Avoid busy-polling on archs where cpu_relax() is a no-op
Date: Fri, 09 Oct 2026 11:46:11 +0100 [thread overview]
Message-ID: <7ba9bf65e714a17657252a7fb267928f8215bc06.camel@infradead.org> (raw)
In-Reply-To: <20261009100738.31288-4-will@kernel.org>
[-- Attachment #1: Type: text/plain, Size: 241 bytes --]
On Fri, 2026-10-09 at 11:07 +0100, Will Deacon wrote:
> Change cpuhp_ap_sync_alive() to poll using atomic_cond_read_relaxed()
relaxed.
...
> + atomic_cond_read_acquire(st, VAL == SYNC_STATE_SHOULD_ONLINE);
acquire.
[-- Attachment #2: smime.p7s --]
[-- Type: application/pkcs7-signature, Size: 6179 bytes --]
next prev parent reply other threads:[~2026-10-09 10:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 10:07 [PATCH v2 00/23] arm64: Implement parallel CPU onlining with PSCI v0.2+ Will Deacon
2026-10-09 10:07 ` [PATCH v2 01/23] cpu/hotplug: Clean up cmpxchg() logic in cpuhp_can_boot_ap() Will Deacon
2026-10-09 10:07 ` [PATCH v2 02/23] cpu/hotplug: Avoid trying to bring up CPUs that are already online Will Deacon
2026-10-09 10:07 ` [PATCH v2 03/23] cpu/hotplug: Avoid busy-polling on archs where cpu_relax() is a no-op Will Deacon
2026-10-09 10:46 ` David Woodhouse [this message]
2026-10-09 11:07 ` Will Deacon
2026-10-09 10:07 ` [PATCH v2 04/23] cpu/hotplug: Propagate bring-up status to arch_cpuhp_cleanup_kick_cpu() Will Deacon
2026-10-09 10:07 ` [PATCH v2 05/23] arm64: cpufeature: Check arm64_ftr_regs[] before the first store Will Deacon
2026-10-09 10:07 ` [PATCH v2 06/23] arm64: cpufeature: Add read_cpuid_with_overrides() Will Deacon
2026-10-09 10:07 ` [PATCH v2 07/23] arm64: cpufeature: Read MPAMIDR_EL1 in __cpuinfo_store_cpu() Will Deacon
2026-10-09 15:44 ` Ben Horgan
2026-10-09 10:07 ` [PATCH v2 08/23] arm64: cpufeature: Store every ID register with its overrides applied Will Deacon
2026-10-09 15:51 ` Ben Horgan
2026-10-09 10:07 ` [PATCH v2 09/23] arm64: smp: Tidy up smp_prepare_cpus() Will Deacon
2026-10-09 10:07 ` [PATCH v2 10/23] arm64: smp: Tidy up cpuinfo init and cpufeature updates Will Deacon
2026-10-09 10:07 ` [PATCH v2 11/23] arm64: smp: Defer update of secondary CPU capabilities Will Deacon
2026-10-09 10:07 ` [PATCH v2 12/23] arm64: smp: Don't bother printing the I-cache policy for each CPU Will Deacon
2026-10-09 10:07 ` [PATCH v2 13/23] arm64: smp: Defer RCU registration during secondary CPU bringup Will Deacon
2026-10-09 10:07 ` [PATCH v2 14/23] arm64: smp: Use generic HOTPLUG_CORE_SYNC_FULL machinery for CPU onlining Will Deacon
2026-10-09 10:07 ` [PATCH v2 15/23] arm64: smp: Use generic HOTPLUG_SPLIT_STARTUP " Will Deacon
2026-10-09 10:07 ` [PATCH v2 16/23] arm64: cpu_ops: Make 'cpu_operations' pointer global instead of per-cpu Will Deacon
2026-10-09 10:07 ` [PATCH v2 17/23] arm64: cpu_ops: Introduce get_secondary_cpu_ops() Will Deacon
2026-10-09 10:07 ` [PATCH v2 18/23] firmware/psci: Cache PSCI v0.2+ version number to avoid redundant SMCs Will Deacon
2026-10-09 10:07 ` [PATCH v2 19/23] firmware/psci: Extend ->cpu_on() callback to take an additional argument Will Deacon
2026-10-09 10:07 ` [PATCH v2 20/23] arm64: cpu_ops: Expose optional argument to target cpu in ->cpu_boot() Will Deacon
2026-10-09 10:07 ` [PATCH v2 21/23] arm64: smp: Pass secondary CPU boot parameters via firmware if possible Will Deacon
2026-10-09 10:07 ` [PATCH v2 22/23] arm64: smp: Use generic HOTPLUG_PARALLEL machinery for CPU onlining Will Deacon
2026-10-09 10:07 ` [PATCH v2 23/23] arm64: smp: Harden parallel CPU bringup against broken PSCI firmware Will Deacon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7ba9bf65e714a17657252a7fb267928f8215bc06.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=ben.horgan@arm.com \
--cc=bp@alien8.de \
--cc=catalin.marinas@arm.com \
--cc=fuad.tabba@linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lpieralisi@kernel.org \
--cc=mark.rutland@arm.com \
--cc=maz@kernel.org \
--cc=pankaj.patil@oss.qualcomm.com \
--cc=peterz@infradead.org \
--cc=ruanjinjie@huawei.com \
--cc=stefion@google.com \
--cc=tarunsahu@google.com \
--cc=tglx@kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox