linux-kernel - Re: [PATCH] MM: handle THP in swap_*page_fs()

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Message-ID: <Ym9pLhqtf61AVrZG@casper.infradead.org>
Date:   Mon, 2 May 2022 06:16:30 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     NeilBrown <neilb@...e.de>
Cc:     Miaohe Lin <linmiaohe@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Christoph Hellwig <hch@....de>, linux-nfs@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MM: handle THP in swap_*page_fs() - count_vm_events()

On Mon, May 02, 2022 at 02:57:46PM +1000, NeilBrown wrote:
> @@ -390,9 +392,9 @@ static void sio_read_complete(struct kiocb *iocb, long ret)
>  			struct page *page = sio->bvec[p].bv_page;
>  
>  			SetPageUptodate(page);
> +			count_swpout_vm_event(page);
>  			unlock_page(page);
>  		}
> -		count_vm_events(PSWPIN, sio->pages);

Surely that should be count_swpIN_vm_event?