Hi Marek,
On Thu, 4 Sept 2025 at 18:49, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> 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@xxxxxxxxxxx>
> > Closes: https://lore.kernel.org/lkml/8c861182-7e90-4bbf-ac04-173d59f5af69@xxxxxxxxxxx/
> > Link: https://lore.kernel.org/lkml/8c861182-7e90-4bbf-ac04-173d59f5af69@xxxxxxxxxxx/ [1]
> > Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
> > ---
> > 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@xxxxxxxxxxx/
>
> and yes, it fixes the reported issue.
>
> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Sorry I hadn't noticed your patch for this. Let's go with your fix
then as it seems more succinct.
Thanks,
Peter
