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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 BE154C433DB for ; Sat, 26 Dec 2020 21:43:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8CDDA21D7A for ; Sat, 26 Dec 2020 21:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726089AbgLZVnY (ORCPT ); Sat, 26 Dec 2020 16:43:24 -0500 Received: from casper.infradead.org ([90.155.50.34]:32964 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725989AbgLZVnY (ORCPT ); Sat, 26 Dec 2020 16:43:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=4olHbSDjwG6n/OG9RW7BnLDOSD34WqpyWEqi+69B4eE=; b=YCjWq3kWsb8g53CSpAlmT2oaBJ nC3GR3LqUiN58lfPazvooKGIqeZw+N8fT/SjFreJtYzhNVnSPkwxr9kry2bsF/o3CmwIWm8bQkX7E HPXqNppGbGwdHXE4ceNhseY+eTumJa1pasQp7UjZSKq9L7h0sz6yNdUGIiCyreO5zIFaEIpU6gTiU F7YxNhV07CE+NOUky2TE+Bh3MnSQOdMcGM5cYsrLQeI+dDk1uU2iQFPcW8mpioX4hQ+Wgx17rwb+7 1bCLlHh6ZB19a58yalcvBYWRf7CLrHts52+R64fkG2HsCaud6HSHMSy7QjTkKB4PZtZQXk/JNpqZk JoseuZDw==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1ktHJC-0001eD-Cl; Sat, 26 Dec 2020 21:41:17 +0000 Date: Sat, 26 Dec 2020 21:41:06 +0000 From: Matthew Wilcox To: "Kirill A. Shutemov" Cc: Linus Torvalds , Hugh Dickins , "Kirill A. Shutemov" , Will Deacon , Linux Kernel Mailing List , Linux-MM , Linux ARM , Catalin Marinas , Jan Kara , Minchan Kim , Andrew Morton , Vinayak Menon , Android Kernel Team Subject: Re: [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting Message-ID: <20201226214106.GA5479@casper.infradead.org> References: <20201218110400.yve45r3zsv7qgfa3@box> <20201219124103.w6isern3ywc7xbur@box> <20201222100047.p5zdb4ghagncq2oe@box> <20201225113157.e7hmluffh56fszfc@box> <20201226204335.dikqkrkezqet6oqf@box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201226204335.dikqkrkezqet6oqf@box> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Dec 26, 2020 at 11:43:35PM +0300, Kirill A. Shutemov wrote: > +static struct page *next_stable_page(struct page *page, struct vm_fault *vmf, > + struct xa_state *xas, pgoff_t end_pgoff) A "stable page" means one that doesn't currently have an outstanding write (see wait_for_stable_page()). It's really "Next trivially insertable page". I might call it "next_uptodate_page()" and gloss over the other reasons this might fail to return a page. 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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 4CD20C433DB for ; Sat, 26 Dec 2020 21:44:05 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EC14C2184D for ; Sat, 26 Dec 2020 21:44:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EC14C2184D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gIFKjuRuZSqOcrUUDHtPfw+OUpYFNTpJ+oaPaDCTB+k=; b=Wfj9bARyTRxDDPH5VtCPmHvY5 2HzMXie70Nr48rhhjb16grBVywOOMsLOhc9D4PEgJ0ZwDYTI0m+Byfn5LhzazZwRzmmuBrWjLU1sR nLVCog3Ik72mPFrEKHphzUAZxG7MZrk1VANp7e0uY9pS1jKs2eq7nTF3+WqVujLwlOrc7DmNs9MiL AFzqDPtY1VlzhBphKBtoIcY5DMySfLKO+cwFqrWj1xFln/AEr/gHljpDQ+QDAOnQq5n28jM5Drfxq SXAxK3gFN3EqhVLfGrOOFDAWLpZQEFYzrG2SDYgV5r8pmDml4tiN+tnhrzFLD84Y7B8CyEBOCeGc5 O/sHk8tNA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ktHK0-0006ts-5e; Sat, 26 Dec 2020 21:41:56 +0000 Received: from casper.infradead.org ([90.155.50.34]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ktHJy-0006tj-LV for linux-arm-kernel@merlin.infradead.org; Sat, 26 Dec 2020 21:41:54 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=4olHbSDjwG6n/OG9RW7BnLDOSD34WqpyWEqi+69B4eE=; b=YCjWq3kWsb8g53CSpAlmT2oaBJ nC3GR3LqUiN58lfPazvooKGIqeZw+N8fT/SjFreJtYzhNVnSPkwxr9kry2bsF/o3CmwIWm8bQkX7E HPXqNppGbGwdHXE4ceNhseY+eTumJa1pasQp7UjZSKq9L7h0sz6yNdUGIiCyreO5zIFaEIpU6gTiU F7YxNhV07CE+NOUky2TE+Bh3MnSQOdMcGM5cYsrLQeI+dDk1uU2iQFPcW8mpioX4hQ+Wgx17rwb+7 1bCLlHh6ZB19a58yalcvBYWRf7CLrHts52+R64fkG2HsCaud6HSHMSy7QjTkKB4PZtZQXk/JNpqZk JoseuZDw==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1ktHJC-0001eD-Cl; Sat, 26 Dec 2020 21:41:17 +0000 Date: Sat, 26 Dec 2020 21:41:06 +0000 From: Matthew Wilcox To: "Kirill A. Shutemov" Subject: Re: [PATCH 1/2] mm: Allow architectures to request 'old' entries when prefaulting Message-ID: <20201226214106.GA5479@casper.infradead.org> References: <20201218110400.yve45r3zsv7qgfa3@box> <20201219124103.w6isern3ywc7xbur@box> <20201222100047.p5zdb4ghagncq2oe@box> <20201225113157.e7hmluffh56fszfc@box> <20201226204335.dikqkrkezqet6oqf@box> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201226204335.dikqkrkezqet6oqf@box> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Android Kernel Team , Jan Kara , Minchan Kim , Linus Torvalds , Hugh Dickins , Linux Kernel Mailing List , Linux-MM , Vinayak Menon , Linux ARM , Catalin Marinas , Andrew Morton , Will Deacon , "Kirill A. Shutemov" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Dec 26, 2020 at 11:43:35PM +0300, Kirill A. Shutemov wrote: > +static struct page *next_stable_page(struct page *page, struct vm_fault *vmf, > + struct xa_state *xas, pgoff_t end_pgoff) A "stable page" means one that doesn't currently have an outstanding write (see wait_for_stable_page()). It's really "Next trivially insertable page". I might call it "next_uptodate_page()" and gloss over the other reasons this might fail to return a page. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel