linux-ext4 - Re: [PATCH 1/2] ext4: remove check for zero nr_to_scan in ext4_es

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Date:   Mon, 24 May 2021 11:51:59 +0200
From:   Jan Kara <jack@...e.cz>
To:     Zhang Yi <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, tytso@....edu,
        adilger.kernel@...ger.ca, jack@...e.cz, yukuai3@...wei.com
Subject: Re: [PATCH 1/2] ext4: remove check for zero nr_to_scan in
 ext4_es_scan()

On Sat 22-05-21 18:30:44, Zhang Yi wrote:
> After converting fs shrinkers to new scan/count API, we are no longer
> pass zero nr_to_scan parameter to detect the number of objects to free,
> just remove this check.
> 
> Fixes: 1ab6c4997e04 ("fs: convert fs shrinkers to new scan/count API")
> Cc: stable@...r.kernel.org # 3.12+
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>

Looks good. Thanks for the patch. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/ext4/extents_status.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
> index 0a729027322d..db3cd70a72e4 100644
> --- a/fs/ext4/extents_status.c
> +++ b/fs/ext4/extents_status.c
> @@ -1574,9 +1574,6 @@ static unsigned long ext4_es_scan(struct shrinker *shrink,
>  	ret = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt);
>  	trace_ext4_es_shrink_scan_enter(sbi->s_sb, nr_to_scan, ret);
>  
> -	if (!nr_to_scan)
> -		return ret;
> -
>  	nr_shrunk = __es_shrink(sbi, nr_to_scan, NULL);
>  
>  	trace_ext4_es_shrink_scan_exit(sbi->s_sb, nr_shrunk, ret);
> -- 
> 2.25.4
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR