Re: [PATCH] mm: page_alloc: avoid merging non-fallbackable pageblocks with others.

From: Vlastimil Babka
Date: Tue Jan 25 2022 - 10:55:06 EST


On 1/24/22 18:59, Zi Yan wrote:
> From: Zi Yan <ziy@xxxxxxxxxx>
>
> This is done in addition to MIGRATE_ISOLATE pageblock merge avoidance.
> It prepares for the upcoming removal of the MAX_ORDER-1 alignment
> requirement for CMA and alloc_contig_range().
>
> MIGRARTE_HIGHATOMIC should not merge with other migratetypes like
> MIGRATE_ISOLATE and MIGRARTE_CMA[1], so this commit prevents that too.
>
> Remove MIGRARTE_CMA and MIGRATE_ISOLATE from fallbacks list, since they
> are never used.
>
> [1] https://lore.kernel.org/linux-mm/20211130100853.GP3366@xxxxxxxxxxxxxxxxxxx/
>
> Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
> Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>