linux-kernel - Re: [PATCH] mm/thp: Update mm_struct's MM

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Date:   Tue, 18 May 2021 10:12:11 -0400
From:   Zi Yan <ziy@...dia.com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-mm@...ck.org, akpm@...ux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/thp: Update mm_struct's MM_ANONPAGES stat for huge zero pages

On 18 May 2021, at 0:48, Anshuman Khandual wrote:

> Although the zero huge page is being shared across various processes, each
> mapping needs to update its mm_struct's MM_ANONPAGES stat by HPAGE_PMD_NR
> to be consistent. This just updates the stats in set_huge_zero_page() after
> the mapping gets created and in zap_huge_pmd() when mapping gets destroyed.
>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Zi Yan <ziy@...dia.com>
> Cc: linux-mm@...ck.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
> This applies on v5.13-rc2.
>
> Changes in V1:
>
> - Updated MM_ANONPAGES stat in zap_huge_pmd()
> - Updated the commit message
>
> Changes in RFC:
>
> https://lore.kernel.org/linux-mm/1620890438-9127-1-git-send-email-anshuman.khandual@arm.com/
>
>  mm/huge_memory.c | 2 ++
>  1 file changed, 2 insertions(+)
>
LGTM. Thanks. Reviewed-by: Zi Yan<ziy@...dia.com>

—
Best Regards,
Yan, Zi

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