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Shutemov" To: "Matthew Wilcox (Oracle)" Cc: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Yu Zhao , Christoph Hellwig , David Howells Subject: Re: [PATCH v12 11/33] mm/lru: Add folio LRU functions Message-ID: <20210628124050.6xa7m6n362hst2op@box.shutemov.name> References: <20210622114118.3388190-1-willy@infradead.org> <20210622114118.3388190-12-willy@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210622114118.3388190-12-willy@infradead.org> Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b=Oxksn4yK; spf=none (imf13.hostedemail.com: domain of kirill@shutemov.name has no SPF policy when checking 209.85.208.179) smtp.mailfrom=kirill@shutemov.name; dmarc=none X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: CBCF3E00026F X-Stat-Signature: 4wze6e1hqhdi5g3o76eaoqq6qfur7xn3 X-HE-Tag: 1624884052-348631 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 Tue, Jun 22, 2021 at 12:40:56PM +0100, Matthew Wilcox (Oracle) wrote: > Handle arbitrary-order folios being added to the LRU. By definition, > all pages being added to the LRU were already head or base pages, > so define page wrappers around folio functions where the original > page functions involved calling compound_head() to manipulate flags, > but define folio wrappers around page functions where there's no need to > call compound_head(). The one thing that does change for those functions > is calling compound_nr() instead of thp_nr_pages(), in order to handle > arbitrary-sized folios. > > Saves 783 bytes of kernel text; no functions grow. > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Yu Zhao > Reviewed-by: Christoph Hellwig > Reviewed-by: David Howells Acked-by: Kirill A. Shutemov -- Kirill A. Shutemov