Re: [PATCH v2 6/8] riscv: Enable memory hotplugging for RISC-V

[David Hildenbrand]

On 14.05.24 20:17, Björn Töpel wrote:
> Alexandre Ghiti <alexghiti@xxxxxxxxxxxx> writes:
>
> > On Tue, May 14, 2024 at 4:05 PM Björn Töpel <bjorn@xxxxxxxxxx> wrote:
> > > From: Björn Töpel <bjorn@xxxxxxxxxxxx>
> > >
> > > Enable ARCH_ENABLE_MEMORY_HOTPLUG and ARCH_ENABLE_MEMORY_HOTREMOVE for
> > > RISC-V.
> > >
> > > Signed-off-by: Björn Töpel <bjorn@xxxxxxxxxxxx>
> > > ---
> > >   arch/riscv/Kconfig | 2 ++
> > >   1 file changed, 2 insertions(+)
> > >
> > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > > index 6bec1bce6586..b9398b64bb69 100644
> > > --- a/arch/riscv/Kconfig
> > > +++ b/arch/riscv/Kconfig
> > > @@ -16,6 +16,8 @@ config RISCV
> > >          select ACPI_REDUCED_HARDWARE_ONLY if ACPI
> > >          select ARCH_DMA_DEFAULT_COHERENT
> > >          select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
> > > +       select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM && 64BIT && MMU
> >
> > I think this should be SPARSEMEM_VMEMMAP here.
>
> Hmm, care to elaborate? I thought that was optional.

There was a discussion at LSF/MM today to maybe require 
SPARSEMEM_VMEMMAP for hotplug. Would that work here as well?

--
Cheers,

David / dhildenb