linux-kernel - Re: [PATCH v1 00/29] mm/migration: rework movable

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Message-ID: <bf300002-7020-44c2-bda8-e4fa718832bf@redhat.com>
Date: Tue, 1 Jul 2025 21:38:35 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org, linux-doc@...r.kernel.org,
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Subject: Re: [PATCH v1 00/29] mm/migration: rework movable_ops page migration
 (part 1)

On 30.06.25 14:59, David Hildenbrand wrote:
> Based on mm/mm-new.
> 
> In the future, as we decouple "struct page" from "struct folio", pages
> that support "non-lru page migration" -- movable_ops page migration
> such as memory balloons and zsmalloc -- will no longer be folios. They
> will not have ->mapping, ->lru, and likely no refcount and no
> page lock. But they will have a type and flags :)
> 
> This is the first part (other parts not written yet) of decoupling
> movable_ops page migration from folio migration.
> 
> In this series, we get rid of the ->mapping usage, and start cleaning up
> the code + separating it from folio migration.
> 
> Migration core will have to be further reworked to not treat movable_ops
> pages like folios. This is the first step into that direction.
> 
> Heavily tested with virtio-balloon and lightly tested with zsmalloc
> on x86-64. Cross-compile-tested.

Thanks everybody for the review!

I'm planning on sending v2 probably later tomorrow, so we can get it 
into mm-new.

So if someone wants to review parts of this series either (a) do it 
until tomorrow; or (b) scream STOP and I'll wait with v2 a bit longer; 
or (c) wait until v2.

-- 
Cheers,

David / dhildenb