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Wed, 11 Aug 2021 10:54:05 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id gddsNE2sE2HjFQAAGKfGzw (envelope-from ); Wed, 11 Aug 2021 10:54:05 +0000 Subject: Re: [PATCH v14 040/138] mm/memcg: Convert mem_cgroup_charge() to take a folio To: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig , Michal Hocko , Johannes Weiner , Vladimir Davydov References: <20210715033704.692967-1-willy@infradead.org> <20210715033704.692967-41-willy@infradead.org> From: Vlastimil Babka Message-ID: <40a868bf-61dc-1832-4799-ff85018ebcec@suse.cz> Date: Wed, 11 Aug 2021 12:54:05 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210715033704.692967-41-willy@infradead.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=iQOx39Cq; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=LKWKi2se; spf=pass (imf03.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 4621230039BC X-Stat-Signature: udcdq8qgygwq6459mxwqacewxb1exb7f X-HE-Tag: 1628679247-168724 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 7/15/21 5:35 AM, Matthew Wilcox (Oracle) wrote: > Convert all callers of mem_cgroup_charge() to call page_folio() on the > page they're currently passing in. Many of them will be converted to > use folios themselves soon. > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Christoph Hellwig Acked-by: Vlastimil Babka > diff --git a/mm/memcontrol.c b/mm/memcontrol.c > index c2ffad021e09..03283d97b62a 100644 > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -6681,10 +6681,9 @@ void mem_cgroup_calculate_protection(struct mem_cgroup *root, > atomic_long_read(&parent->memory.children_low_usage))); > } > > -static int __mem_cgroup_charge(struct page *page, struct mem_cgroup *memcg, > +static int __mem_cgroup_charge(struct folio *folio, struct mem_cgroup *memcg, > gfp_t gfp) The git/next version also renames this function to charge_memcg(), why? The new name doesn't look that internal as the old one. I don't have a strong opinion but CCing memcg maintainers who might. > { > - struct folio *folio = page_folio(page); > unsigned int nr_pages = folio_nr_pages(folio); > int ret; > > @@ -6697,27 +6696,27 @@ static int __mem_cgroup_charge(struct page *page, struct mem_cgroup *memcg, > > local_irq_disable(); > mem_cgroup_charge_statistics(memcg, nr_pages); > - memcg_check_events(memcg, page_to_nid(page)); > + memcg_check_events(memcg, folio_nid(folio)); > local_irq_enable(); > out: > return ret; > } >