linux-kernel - Re: [PATCH v4 0/4] Make MIGRATE

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Message-ID: <55f41277-f686-455c-a6ac-86c7e952beb0@redhat.com>
Date: Mon, 19 May 2025 09:44:19 +0200
From: David Hildenbrand <david@...hat.com>
To: Zi Yan <ziy@...dia.com>, Oscar Salvador <osalvador@...e.de>,
 Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Vlastimil Babka <vbabka@...e.cz>, Baolin Wang
 <baolin.wang@...ux.alibaba.com>,
 "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
 Mel Gorman <mgorman@...hsingularity.net>,
 Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
 Brendan Jackman <jackmanb@...gle.com>, Richard Chang
 <richardycc@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/4] Make MIGRATE_ISOLATE a standalone bit

On 09.05.25 22:01, Zi Yan wrote:
> Hi David and Oscar,

Hi,

> 
> Can you take a look at Patch 2, which changes how online_pages() set
> online pageblock migratetypes?

Sorry, now looking :)

> It used to first set all pageblocks to
> MIGRATE_ISOLATE, then let undo_isolate_page_range() move the pageblocks
> to MIGRATE_MOVABLE. After MIGRATE_ISOLATE becomes a standalone bit, all
> online pageblocks need to have a migratetype other than MIGRATE_ISOLATE.
> Let me know if there is any issue with my changes.

Conceptually, we should start with MIGRATE_MOVABLE + isolated, to then 
clear the isolated bit.

Let me take a look.

-- 
Cheers,

David / dhildenb