From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Gregory Price <gourry@gourry.net>
Cc: linux-kernel@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
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Subject: Re: [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE
Date: Thu, 19 Mar 2026 19:08:57 +0100 [thread overview]
Message-ID: <e166588e-036c-4fa3-81fc-d7aca9f02c29@kernel.org> (raw)
In-Reply-To: <abwVK8nLpSLVcT5G@gourry-fedora-PF4VCD3F>
On 3/19/26 16:24, Gregory Price wrote:
> 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) <david@kernel.org>
>
> HOTREMOVE has long been a thorn in my side, I appreciate you cleaning
> this up.
On a long cardrive today I was wondering: do we still need a separate
MEMORY_HOTREMOVE
Now we'll have
config MEMORY_HOTREMOVE
bool "Allow for memory hot remove"
select HAVE_BOOTMEM_INFO_NODE if (X86_64 || PPC64)
depends on MEMORY_HOTPLUG
select MIGRATION
I'll try to get rid of that HAVE_BOOTMEM_INFO_NODE shite next.
Then it's really just MIGRATION and some sprinkled
CONFIG_MEMORY_HOTREMOVE. Not a lot of code.
--
Cheers,
David
next prev parent reply other threads:[~2026-03-19 18:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-19 8:19 [PATCH 0/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION David Hildenbrand (Arm)
2026-03-19 8:19 ` [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE David Hildenbrand (Arm)
2026-03-19 13:59 ` Zi Yan
2026-03-19 14:11 ` Lorenzo Stoakes (Oracle)
2026-03-19 14:14 ` Joshua Hahn
2026-03-19 15:24 ` Gregory Price
2026-03-19 16:34 ` Lorenzo Stoakes (Oracle)
2026-03-20 19:34 ` Gregory Price
2026-03-19 18:08 ` David Hildenbrand (Arm) [this message]
2026-03-19 18:12 ` Zi Yan
2026-03-19 18:15 ` David Hildenbrand (Arm)
2026-03-19 18:23 ` Zi Yan
2026-03-19 16:18 ` Mike Rapoport
2026-03-19 18:10 ` David Hildenbrand (Arm)
2026-03-19 8:19 ` [PATCH 2/2] mm: introduce CONFIG_NUMA_MIGRATION and simplify CONFIG_MIGRATION David Hildenbrand (Arm)
2026-03-19 14:20 ` Lorenzo Stoakes (Oracle)
2026-03-19 17:39 ` Zi Yan
2026-03-19 11:03 ` [PATCH 0/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION Jonathan Cameron
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