linux-kernel - Re: [PATCH v4 3/7] mm: memcontrol: convert NR_FILE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20201211135737.GA2443@casper.infradead.org>
Date:   Fri, 11 Dec 2020 13:57:37 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org, adobriyan@...il.com,
        akpm@...ux-foundation.org, hannes@...xchg.org, mhocko@...nel.org,
        vdavydov.dev@...il.com, hughd@...gle.com, shakeelb@...gle.com,
        guro@...com, samitolvanen@...gle.com, feng.tang@...el.com,
        neilb@...e.de, iamjoonsoo.kim@....com, rdunlap@...radead.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, cgroups@...r.kernel.org
Subject: Re: [PATCH v4 3/7] mm: memcontrol: convert NR_FILE_THPS account to
 pages

On Fri, Dec 11, 2020 at 12:19:50PM +0800, Muchun Song wrote:
> +++ b/mm/filemap.c
> @@ -207,7 +207,7 @@ static void unaccount_page_cache_page(struct address_space *mapping,
>  		if (PageTransHuge(page))
>  			__dec_lruvec_page_state(page, NR_SHMEM_THPS);
>  	} else if (PageTransHuge(page)) {
> -		__dec_lruvec_page_state(page, NR_FILE_THPS);
> +		__mod_lruvec_page_state(page, NR_FILE_THPS, -HPAGE_PMD_NR);

+               __mod_lruvec_page_state(page, NR_FILE_THPS, -nr);

> +++ b/mm/huge_memory.c
> @@ -2748,7 +2748,8 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
>  			if (PageSwapBacked(head))
>  				__dec_lruvec_page_state(head, NR_SHMEM_THPS);
>  			else
> -				__dec_lruvec_page_state(head, NR_FILE_THPS);
> +				__mod_lruvec_page_state(head, NR_FILE_THPS,
> +							-HPAGE_PMD_NR);

+                               __mod_lruvec_page_state(head, NR_FILE_THPS,
+                                               -thp_nr_pages(head));