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Thu, 12 Aug 2021 17:48:31 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id yoJfHe9eFWE1FAAAGKfGzw (envelope-from ); Thu, 12 Aug 2021 17:48:31 +0000 Subject: Re: [PATCH v14 089/138] mm/filemap: Add FGP_STABLE To: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org References: <20210715033704.692967-1-willy@infradead.org> <20210715033704.692967-90-willy@infradead.org> From: Vlastimil Babka Message-ID: <98fae935-a50c-c604-82de-2dab5e18b6b0@suse.cz> Date: Thu, 12 Aug 2021 19:48:31 +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: <20210715033704.692967-90-willy@infradead.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=pDbunGNV; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b="4XC//al3"; spf=pass (imf20.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: rspam06 X-Rspamd-Queue-Id: B5E63D003BCB X-Stat-Signature: 4ymyu9erkgjjrz3ucqiagtsf637ta3c3 X-HE-Tag: 1628790512-308869 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 5:36 AM, Matthew Wilcox (Oracle) wrote: > Allow filemap_get_folio() to wait for writeback to complete (if the > filesystem wants that behaviour). This is the folio equivalent of > grab_cache_page_write_begin(), which is moved into the folio-compat > file as a reminder to migrate all the code using it. This paves the > way for getting rid of AOP_FLAG_NOFS once grab_cache_page_write_begin() > is removed. > > Kernel grows by 11 bytes. filemap_get_folio() grows by 33 bytes but > grab_cache_page_write_begin() shrinks by 22 bytes to make up for it. > > Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Vlastimil Babka