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Thu, 12 Aug 2021 16:14:23 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id yCE/BN9IFWEpfgAAGKfGzw (envelope-from ); Thu, 12 Aug 2021 16:14:23 +0000 Subject: Re: [PATCH v14 072/138] mm/writeback: Add folio_account_cleaned() To: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig References: <20210715033704.692967-1-willy@infradead.org> <20210715033704.692967-73-willy@infradead.org> From: Vlastimil Babka Message-ID: Date: Thu, 12 Aug 2021 18:14:22 +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: <20210715033704.692967-73-willy@infradead.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 51AA09013A4C Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=gVnMmlBd; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=YkfeMqGb; dmarc=none; spf=pass (imf29.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.29 as permitted sender) smtp.mailfrom=vbabka@suse.cz X-Rspamd-Server: rspam04 X-Stat-Signature: dhz1ufq1zhnc7dqjpj7z8w1h3354ikap X-HE-Tag: 1628784864-102006 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: > Get the statistics right; compound pages were being accounted as a > single page. This didn't matter before now as no filesystem which > supported compound pages did writeback. Also move the declaration > to filemap.h since this is part of the page cache. Add a wrapper for Seems to be pagemap.h :) > account_page_cleaned(). > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Christoph Hellwig Acked-by: Vlastimil Babka Nit below: > diff --git a/mm/page-writeback.c b/mm/page-writeback.c > index bd97c461d499..792a83bd3917 100644 > --- a/mm/page-writeback.c > +++ b/mm/page-writeback.c > @@ -2453,14 +2453,15 @@ static void folio_account_dirtied(struct folio *folio, > * > * Caller must hold lock_page_memcg(). > */ > -void account_page_cleaned(struct page *page, struct address_space *mapping, > +void folio_account_cleaned(struct folio *folio, struct address_space *mapping, > struct bdi_writeback *wb) > { > if (mapping_can_writeback(mapping)) { > - dec_lruvec_page_state(page, NR_FILE_DIRTY); > - dec_zone_page_state(page, NR_ZONE_WRITE_PENDING); > - dec_wb_stat(wb, WB_RECLAIMABLE); > - task_io_account_cancelled_write(PAGE_SIZE); > + long nr = folio_nr_pages(folio); > + lruvec_stat_mod_folio(folio, NR_FILE_DIRTY, -nr); > + zone_stat_mod_folio(folio, NR_ZONE_WRITE_PENDING, -nr); > + wb_stat_mod(wb, WB_RECLAIMABLE, -nr); > + task_io_account_cancelled_write(folio_size(folio)); In "mm/writeback: Add __folio_mark_dirty()" you used nr*PAGE_SIZE. Consistency? > } > } > >