Re: [PATCH 04/10] btrfs: convert btrfs_compr_pool_scan() to use folios

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2026/9/7 07:59, Tal Zussman 写道:
> The compression pool holds order-0 folios, but btrfs_compr_pool_scan()
> walks it as struct page through page->lru. Walk it as folios, matching
> the other compression pool functions. This removes the last use of
> page->lru in btrfs and saves a call to compound_head() per freed
> folio.
> 
> Signed-off-by: Tal Zussman <tz2294@columbia.edu>

Reviewed-by: Qu Wenruo <wqu@suse.com>

Thanks,
Qu

> ---
>   fs/btrfs/compression.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
> index c62b5148d5ac..979b2ffbd8fc 100644
> --- a/fs/btrfs/compression.c
> +++ b/fs/btrfs/compression.c
> @@ -168,10 +168,10 @@ static unsigned long btrfs_compr_pool_scan(struct shrinker *sh, struct shrink_co
>   	spin_unlock(&compr_pool.lock);
>   
>   	list_for_each_safe(tmp, next, &remove) {
> -		struct page *page = list_entry(tmp, struct page, lru);
> +		struct folio *folio = list_entry(tmp, struct folio, lru);
>   
> -		ASSERT(page_ref_count(page) == 1);
> -		put_page(page);
> +		ASSERT(folio_ref_count(folio) == 1);
> +		folio_put(folio);
>   	}
>   
>   	return freed;
>