linux-kernel - Re: [PATCH v3 3/4] mm/damon: Convert damon_pa_mark_accessed_or

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Message-Id: <20221208215201.116835-1-sj@kernel.org>
Date:   Thu,  8 Dec 2022 21:52:01 +0000
From:   SeongJae Park <sj@...nel.org>
To:     "Vishal Moola (Oracle)" <vishal.moola@...il.com>
Cc:     linux-mm@...ck.org, damon@...ts.linux.dev,
        linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        sj@...nel.org
Subject: Re: [PATCH v3 3/4] mm/damon: Convert damon_pa_mark_accessed_or_deactivate() to use folios

On Thu, 8 Dec 2022 12:35:02 -0800 "Vishal Moola (Oracle)" <vishal.moola@...il.com> wrote:

> This change replaces 2 calls to compound_head() with one.

I hoped this to be more detailed (e.g., 2 calls from mark_page_accessed() and
put_page() with 1 call from page_folio()), but it wouldn't be a blocker as we
had the discussion in v1 of this patch.

> This is in preparation for the conversion of deactivate_page() to
> folio_deactivate().
> 
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>

Reviewed-by: SeongJae Park <sj@...nel.org>

Please note that this conflicts with one of my patches that under review[1] at
the moment.  I will rebase and send the patch again if Andrew merge this first.

[1] https://lore.kernel.org/damon/20221205230830.144349-3-sj@kernel.org/


Thanks,
SJ

> ---
>  mm/damon/paddr.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
> index e1a4315c4be6..73548bc82297 100644
> --- a/mm/damon/paddr.c
> +++ b/mm/damon/paddr.c
> @@ -238,15 +238,18 @@ static inline unsigned long damon_pa_mark_accessed_or_deactivate(
>  
>  	for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
>  		struct page *page = damon_get_page(PHYS_PFN(addr));
> +		struct folio *folio;
>  
>  		if (!page)
>  			continue;
> +		folio = page_folio(page);
> +
>  		if (mark_accessed)
> -			mark_page_accessed(page);
> +			folio_mark_accessed(folio);
>  		else
> -			deactivate_page(page);
> -		put_page(page);
> -		applied++;
> +			deactivate_page(&folio->page);
> +		folio_put(folio);
> +		applied += folio_nr_pages(folio);
>  	}
>  	return applied * PAGE_SIZE;
>  }
> -- 
> 2.38.1