linux-kernel - Re: [PATCH -V2 1/7] migrate: fix syscall move

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Message-ID: <YswPApwvAjvX1VEd@localhost.localdomain>
Date:   Mon, 11 Jul 2022 13:52:34 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Huang Ying <ying.huang@...el.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Zi Yan <ziy@...dia.com>, Yang Shi <shy828301@...il.com>
Subject: Re: [PATCH -V2 1/7] migrate: fix syscall move_pages() return value
 for failure

On Mon, Jul 11, 2022 at 04:49:42PM +0800, Huang Ying wrote:
>  	return store_status(status, start, node, i - start);
> @@ -1768,8 +1768,12 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
>  
>  		err = move_pages_and_store_status(mm, current_node, &pagelist,
>  				status, start, i, nr_pages);
> -		if (err)
> +		if (err) {
> +			/* We have stored status of page i */

IMHO, "We have accounted for page i" gives a more clear statement.

Reviewed-by: Oscar Salvador <osalvador@...e.de>

> +			if (err > 0)
> +				err--;
>  			goto out;
> +		}
>  		current_node = NUMA_NO_NODE;
>  	}
>  out_flush:
> -- 
> 2.30.2
> 
> 

-- 
Oscar Salvador
SUSE Labs