linux-kernel - Re: [PATCH] mm: set pageblock_order to HPAGE_PMD_ORDER in case with !CONFIG_HUGETLB

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Message-ID: <5CECC6AA-F7AE-4C01-AB4B-83E95EE52A1D@nvidia.com>
Date: Fri, 05 Apr 2024 12:36:17 -0400
From: Zi Yan <ziy@...dia.com>
To: Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: akpm@...ux-foundation.org, mgorman@...hsingularity.net, vbabka@...e.cz,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: set pageblock_order to HPAGE_PMD_ORDER in case with
 !CONFIG_HUGETLB_PAGE but THP enabled

On 5 Apr 2024, at 8:24, Baolin Wang wrote:

> As Vlastimil suggested in previous discussion[1], it doesn't make sense to set
> pageblock_order as MAX_PAGE_ORDER when hugetlbfs is not enabled and THP is enabled.
> Instead, it should be set to HPAGE_PMD_ORDER.
>
> [1] https://lore.kernel.org/all/76457ec5-d789-449b-b8ca-dcb6ceb12445@suse.cz/
> Suggested-by: Vlastimil Babka <vbabka@...e.cz>
> Signed-off-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> ---
>  include/linux/pageblock-flags.h | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
LGTM. Reviewed-by: Zi Yan <ziy@...dia.com>

--
Best Regards,
Yan, Zi

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