From: Thomas Gleixner <tglx@linutronix.de>
To: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
Dave Hansen <dave.hansen@intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Dan Williams <dan.j.williams@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>,
Stephane Eranian <eranian@google.com>,
Ricardo Neri <ricardo.neri@intel.com>,
linux-kernel@vger.kernel.org, Alexander Graf <graf@amazon.com>
Subject: Re: [PATCH v7 18/24] init/main: Delay initialization of the lockup detector after smp_init()
Date: Tue, 03 Feb 2026 17:08:56 +0100 [thread overview]
Message-ID: <871pj14xnr.ffs@tglx> (raw)
In-Reply-To: <20230301234753.28582-19-ricardo.neri-calderon@linux.intel.com>
On Wed, Mar 01 2023 at 15:47, Ricardo Neri wrote:
> Certain implementations of the hardlockup detector require support for
> Inter-Processor Interrupt shorthands. On x86, support for these can only
> be determined after all the possible CPUs have booted once (in smp_init()).
> Other architectures may not need such check.
Looking at this with a completely rebooted brain, I think this is not
required at all when the HPET watchdog mechanics to propagate the
watchdog NMI are done differently. I'll comment on that in the related
patch.
Thanks,
tglx
next prev parent reply other threads:[~2026-02-03 16:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-01 23:47 [PATCH v7 00/24] x86: Implement an HPET-based hardlockup detector Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 01/24] x86/apic: Add irq_cfg::delivery_mode Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 02/24] x86/apic/msi: Use the delivery mode from irq_cfg for message composition Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 03/24] x86/apic: Add the X86_IRQ_ALLOC_AS_NMI interrupt allocation flag Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 04/24] x86/apic/vector: Implement a local APIC NMI controller Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 05/24] x86/apic/vector: Skip cleanup for the NMI vector Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 06/24] iommu/vt-d: Clear the redirection hint when the destination mode is physical Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 07/24] iommu/vt-d: Rework prepare_irte() to support per-interrupt delivery mode Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 08/24] iommu/vt-d: Set the IRTE delivery mode individually for each interrupt Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 09/24] iommu/amd: Expose [set|get]_dev_entry_bit() Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 10/24] iommu/amd: Enable NMIPass when allocating an NMI Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 11/24] iommu/amd: Compose MSI messages for NMIs in non-IR format Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 12/24] x86/hpet: Expose hpet_writel() in header Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 13/24] x86/hpet: Add helper function hpet_set_comparator_periodic() Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 14/24] x86/hpet: Prepare IRQ assignments to use the X86_ALLOC_AS_NMI flag Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 15/24] x86/hpet: Reserve an HPET channel for the hardlockup detector Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 16/24] watchdog/hardlockup: Define a generic function to detect hardlockups Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 17/24] watchdog/hardlockup: Decouple the hardlockup detector from perf Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 18/24] init/main: Delay initialization of the lockup detector after smp_init() Ricardo Neri
2026-02-03 16:08 ` Thomas Gleixner [this message]
2023-03-01 23:47 ` [PATCH v7 19/24] x86/watchdog/hardlockup: Add an HPET-based hardlockup detector Ricardo Neri
2026-02-03 17:02 ` Thomas Gleixner
2023-03-01 23:47 ` [PATCH v7 20/24] x86/watchdog/hardlockup/hpet: Determine if HPET timer caused NMI Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 21/24] watchdog/hardlockup/hpet: Only enable the HPET watchdog via a boot parameter Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 22/24] x86/watchdog: Add a shim hardlockup detector Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 23/24] watchdog: Introduce hardlockup_detector_mark_unavailable() Ricardo Neri
2023-03-01 23:47 ` [PATCH v7 24/24] x86/tsc: Stop the HPET hardlockup detector if TSC become unstable Ricardo Neri
2023-04-13 3:58 ` [PATCH v7 00/24] x86: Implement an HPET-based hardlockup detector Ricardo Neri
2026-02-03 15:58 ` Thomas Gleixner
2026-02-04 5:02 ` Ricardo Neri
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