linux-kernel - Re: [PATCH 1/2] mm: memcontrol: remove dead code from memory_max

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Message-ID: <20191023065057.GC754@dhcp22.suse.cz>
Date:   Wed, 23 Oct 2019 08:50:57 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 1/2] mm: memcontrol: remove dead code from
 memory_max_write()

On Tue 22-10-19 16:15:17, Johannes Weiner wrote:
> When the reclaim loop in memory_max_write() is ^C'd or similar, we set
> err to -EINTR. But we don't return err. Once the limit is set, we
> always return success (nbytes). Delete the dead code.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
>  mm/memcontrol.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 055975b0b3a3..ff90d4e7df37 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -6122,10 +6122,8 @@ static ssize_t memory_max_write(struct kernfs_open_file *of,
>  		if (nr_pages <= max)
>  			break;
>  
> -		if (signal_pending(current)) {
> -			err = -EINTR;
> +		if (signal_pending(current))
>  			break;
> -		}
>  
>  		if (!drained) {
>  			drain_all_stock(memcg);
> -- 
> 2.23.0
> 

-- 
Michal Hocko
SUSE Labs