linux-kernel - Re: [PATCH v6 2/6] mm/page_isolation: make page isolation a standalone bit.

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Message-ID: <53eb14e4-bd3a-469a-bceb-f79ba2f43d02@suse.cz>
Date: Fri, 30 May 2025 19:04:31 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Zi Yan <ziy@...dia.com>, David Hildenbrand <david@...hat.com>,
 Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Oscar Salvador <osalvador@...e.de>,
 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 v6 2/6] mm/page_isolation: make page isolation a
 standalone bit.

On 5/30/25 18:22, Zi Yan wrote:
> During page isolation, the original migratetype is overwritten, since
> MIGRATE_* are enums and stored in pageblock bitmaps. Change
> MIGRATE_ISOLATE to be stored a standalone bit, PB_migrate_isolate, like
> PB_compact_skip, so that migratetype is not lost during pageblock
> isolation.
> 
> Signed-off-by: Zi Yan <ziy@...dia.com>

Reviewed-by: Vlastimil Babka <vbabka@...e.cz>