From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48D56C432BE for ; Thu, 12 Aug 2021 17:48:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30B7460FED for ; Thu, 12 Aug 2021 17:48:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236986AbhHLRs7 (ORCPT ); Thu, 12 Aug 2021 13:48:59 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:52570 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229851AbhHLRs5 (ORCPT ); Thu, 12 Aug 2021 13:48:57 -0400 Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 991BA221F8; Thu, 12 Aug 2021 17:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1628790511; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Nt13wCC1vTCNH5LpjxYew01TnAzZbKvQXsUqzFCe7IU=; b=pDbunGNVt4PAAzII8myrj+MEsYwGrC+ERYPFticrMA3x4bH3XG5yS/G0/Ik2NbU9ZSMN53 z7rkkGMKgkEDOPNtK1thM4w4iYB0i7LPde98MQ2ZfND0x9t5M9BTM0D7mDtd/uyg4w6bgJ ja5Z46DgzQ+BqdlBnhVrqCuUo/Slu6M= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1628790511; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Nt13wCC1vTCNH5LpjxYew01TnAzZbKvQXsUqzFCe7IU=; b=4XC//al3bI2/RnL8kSyIQe+zllUq5N4zyhl1Pi6nvx3BNT/3cwcJX5D/5ChmDB5u6kqIKO YW5SWMUgTla47BBA== Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap1.suse-dmz.suse.de (Postfix) with ESMTPS id 7D94313AC3; 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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