linux-kernel - Re: [PATCH 16/24] mm/swap: reduce scope of get_swap

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Date:   Sun, 19 Nov 2023 21:12:14 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Kairui Song <kasong@...cent.com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        "Huang, Ying" <ying.huang@...el.com>,
        David Hildenbrand <david@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 16/24] mm/swap: reduce scope of get_swap_device in swapin
 path

On Mon, Nov 20, 2023 at 03:47:32AM +0800, Kairui Song wrote:
>  	page = swapin_readahead(entry, GFP_HIGHUSER_MOVABLE,
>  				vmf, &cache_result);
> -	if (page) {
> +	if (PTR_ERR(page) == -EBUSY) {

	if (page == ERR_PTR(-EBUSY)) {