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=-3.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 A5010C4BA18 for ; Wed, 26 Feb 2020 17:04:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7AAA324683 for ; Wed, 26 Feb 2020 17:04:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="oqOxzjNk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727966AbgBZREA (ORCPT ); Wed, 26 Feb 2020 12:04:00 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:56246 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726214AbgBZREA (ORCPT ); Wed, 26 Feb 2020 12:04:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=i01gqbt0jOHS7aGnKGoXT1IDiIj9QTdzfZHq4JAzLSo=; b=oqOxzjNkWmxBrz8Psl51Ce1Z8a CoUtrBZpVrG1/2uCCd01MozOk+KMmr0tyOUPJqIpBVm5PgJwu+LZ1c0sfkvxGyq53nig6YUxxSV1U EddKbm+YfV3Ef27L3Hi4/Llm6OFIZE3fFNI2XW8ZE8l6ZFJuF0XtiZxlnbzqNWcx7tIdf/jfCV3z8 jQFdfdccS0VLC51pKU6fua8dOSbwQX8aY604bXJovdkgGT+n4JO9JEc49EazIugwXuoMxsLVHC3df Q5QSRHuHd8evZwjGnh2wbQMmYq1ugQZe9iV5XU7vQf0VmfR+nGwLM7LXyxH9I9qNyKWfQ9Chi+FMq jLUY6TLA==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1j706J-0006aV-Gx; Wed, 26 Feb 2020 17:03:59 +0000 Date: Wed, 26 Feb 2020 09:03:59 -0800 From: Christoph Hellwig To: Matthew Wilcox Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, linux-xfs@vger.kernel.org Subject: Re: [PATCH v8 14/25] mm: Document why we don't set PageReadahead Message-ID: <20200226170359.GB22837@infradead.org> References: <20200225214838.30017-1-willy@infradead.org> <20200225214838.30017-15-willy@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200225214838.30017-15-willy@infradead.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Tue, Feb 25, 2020 at 01:48:27PM -0800, Matthew Wilcox wrote: > From: "Matthew Wilcox (Oracle)" > > If the page is already in cache, we don't set PageReadahead on it. > > Signed-off-by: Matthew Wilcox (Oracle) Looks good, Reviewed-by: Christoph Hellwig