[External] Re: [PATCH v6 0/2] Add HARDLOCKUP_DETECTOR_PERF support for RISC-V

[yunhui cui]

Hi Andrew,

On Sat, Nov 15, 2025 at 3:21 AM Doug Anderson <dianders at chromium.org> wrote:
>
> Hi,
>
> On Thu, Nov 13, 2025 at 7:33 PM Yunhui Cui <cuiyunhui at bytedance.com> wrote:
> >
> > After discussion [1],[2], hardlockup_perf cannot be completely replaced by
> > the hardlockup_buddy approach, so this patch is still being submitted.
> >
> > v1->v2:
> > The contents of arch/arm64/watchdog_hld.c are directly consolidated into
> > kernel/watchdog_perf.c.
> >
> >
> > v2->v3:
> > Add CONFIG_WATCHDOG_PERF_ADJUST_PERIOD to enclose the period update logic,
> > select it by default on arm64 and riscv, without affecting other arches
> > like x86 and PPC.
> >
> > v3->v4:
> > Place the line "select WATCHDOG_PERF_ADJUST_PERIOD if HARDLOCKUP_DETECTOR_PERF && CPU_FREQ"
> > in the Kconfig files for arm64 and riscv in one line, with no line breaks.
> >
> > v4->v5:
> > Remove __weak from hw_nmi_get_sample_period()
> >
> > v5->v6:
> > Removed the dependency on CPU_FREQ for WATCHDOG_PERF_ADJUST_PERIOD in Kconfig, which fixes the
> > issue reported at: https://lore.kernel.org/oe-kbuild-all/202510240701.eB6r97V3-lkp@intel.com/
>
> I haven't tried compiling this myself, but it seems like an OK
> solution for the compile-time error to me.
>
> -Doug

Could you please help review and merge this again? Thank you!

>

Thanks,
Yunhui