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Peter Anvin" , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE Message-ID: References: <20260319-config_migration-v1-0-42270124966f@kernel.org> <20260319-config_migration-v1-1-42270124966f@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260319-config_migration-v1-1-42270124966f@kernel.org> On Thu, Mar 19, 2026 at 09:19:40AM +0100, David Hildenbrand (Arm) wrote: > All architectures that select CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE also > select CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG. So we can just remove > CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE. > > For CONFIG_MIGRATION, make it depend on CONFIG_MEMORY_HOTREMOVE instead, > and make CONFIG_MEMORY_HOTREMOVE select CONFIG_MIGRATION (just like > CONFIG_CMA and CONFIG_COMPACTION already do). > > We'll clean up CONFIG_MIGRATION next. > > Signed-off-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) > --- > arch/arm64/Kconfig | 1 - > arch/loongarch/Kconfig | 1 - > arch/powerpc/Kconfig | 1 - > arch/riscv/Kconfig | 1 - > arch/s390/Kconfig | 1 - > arch/x86/Kconfig | 1 - > mm/Kconfig | 9 +++------ > 7 files changed, 3 insertions(+), 12 deletions(-) > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index edc927d9e85a..d01800962d84 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -85,7 +85,6 @@ config S390 > select ARCH_32BIT_USTAT_F_TINODE > select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE > select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM Not really related, but s390 does not have anything but SPARSEMEM_VMEMMAP. > - select ARCH_ENABLE_MEMORY_HOTREMOVE > select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 > select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE > select ARCH_HAS_CC_CAN_LINK -- Sincerely yours, Mike.