From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx197.postini.com [74.125.245.197]) by kanga.kvack.org (Postfix) with SMTP id 059296B00E7 for ; Sat, 21 Apr 2012 14:26:46 -0400 (EDT) Received: by vbbey12 with SMTP id ey12so10213486vbb.14 for ; Sat, 21 Apr 2012 11:26:46 -0700 (PDT) Message-ID: <4F92FBE3.50709@garzik.org> Date: Sat, 21 Apr 2012 14:26:43 -0400 From: Jeff Garzik MIME-Version: 1.0 Subject: Re: [PATCH, RFC 0/3] Introduce new O_HOT and O_COLD flags References: <1334863211-19504-1-git-send-email-tytso@mit.edu> <4F912880.70708@panasas.com> <1334919662.5879.23.camel@dabdike> In-Reply-To: <1334919662.5879.23.camel@dabdike> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: James Bottomley Cc: Lukas Czerner , Boaz Harrosh , Theodore Ts'o , linux-fsdevel@vger.kernel.org, Ext4 Developers List , linux-mm@kvack.org On 04/20/2012 07:01 AM, James Bottomley wrote: > The concern I have is that the notion of hot and cold files *isn't* > propagated to the page cache, it's just shared between the fs and the > disk. Bingo -- full-file hint is too coarse-grained for some workloads. Page granularity would propagate to the VM as well as block layer, and give the required flexibility to all workloads. As well as covering the full-file case. Jeff -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org