linux-kernel - Re: [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim

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Message-ID: <20230913213343.GB48476@cmpxchg.org>
Date:   Wed, 13 Sep 2023 17:33:43 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Vern Hao <haoxing990@...il.com>
Cc:     mhocko@...nel.org, roman.gushchin@...ux.dev, shakeelb@...gle.com,
        akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Xin Hao <vernhao@...cent.com>
Subject: Re: [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim

On Thu, Sep 14, 2023 at 12:49:37AM +0800, Vern Hao wrote:
> @@ -296,6 +295,7 @@ static void swap_writepage_fs(struct page *page, struct writeback_control *wbc)
>  	struct file *swap_file = sis->swap_file;
>  	loff_t pos = page_file_offset(page);
>  
> +	count_swpout_vm_event(page_folio(sio->bvec[p].bv_page));

Argh, this should be

	count_swpout_vm_event(page_folio(page));