Messages in this thread |  | | From | Peter Griffin <> | | Date | Fri, 5 Sep 2025 09:15:37 +0100 | | Subject | Re: [PATCH] clocksource/drivers/exynos_mct: only use IRQF_PERCPU flag on ARM64 SoCs |
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Hi Marek,
On Thu, 4 Sept 2025 at 18:49, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > > On 04.09.2025 17:32, Peter Griffin wrote: > > This patch addresses a regression reported in [1] whereby CPU hotplug now > > fails on little CPUs (for reasons that aren't fully understood) for Arm > > 32bit platforms such as Exynos 5422 used in OdroidXU3/XU4 boards. > > > > Note: This patch makes an assumption that the exynos_mct driver is only > > used on Arm 32/64 bit SoCs. > > > > Fixes: f3cec54ee3bf ("clocksource/drivers/exynos_mct: Set local timer interrupts as percpu") > > Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> > > Closes: https://lore.kernel.org/lkml/8c861182-7e90-4bbf-ac04-173d59f5af69@samsung.com/ > > Link: https://lore.kernel.org/lkml/8c861182-7e90-4bbf-ac04-173d59f5af69@samsung.com/ [1] > > Signed-off-by: Peter Griffin <peter.griffin@linaro.org> > > --- > > Hi Marek & Krzysztof, > > > > Can you test this patch on your Exynos5422 based boards and see if it > > resolves the issue Marek reported of CPU hot plug failing on the little > > cores of Exynos 5422 based boards? > > > > Unfortunately I only have gs101 based Exynos hardware (which is Arm 64 bit > > SoC) to test on. I can confirm CPU hotplug is functional on the little > > cluster CPUs with IRQF_PERCPU flag on Pixel6/gs101 though. > > This is a duplicate of > https://lore.kernel.org/all/20250827102645.1964659-1-m.szyprowski@samsung.com/ > > and yes, it fixes the reported issue. > > Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Sorry I hadn't noticed your patch for this. Let's go with your fix then as it seems more succinct.
Thanks,
Peter
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