From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 482F98D0030 for ; Fri, 29 Oct 2010 08:31:37 -0400 (EDT) Message-ID: <4CCABEA0.8080909@redhat.com> Date: Fri, 29 Oct 2010 08:31:28 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] mm: don't flush TLB when propagate PTE access bit to struct page. References: <1288200090-23554-1-git-send-email-yinghan@google.com> <4CC869F5.2070405@redhat.com> <20101028091158.4de545e9.kamezawa.hiroyu@jp.fujitsu.com> <20101029114529.4d3a8b9c.kamezawa.hiroyu@jp.fujitsu.com> <4CCA42D0.5090603@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Minchan Kim Cc: KAMEZAWA Hiroyuki , Ken Chen , Ying Han , Hugh Dickins , Nick Piggin , linux-mm@kvack.org, Andrew Morton List-ID: On 10/29/2010 12:27 AM, Minchan Kim wrote: > What happens if we don't flush TLB? > It will make for old page to pretend young page. > If it is, how does it affect reclaim? Other way around - it will make a young page pretend to be an old page, because the TLB won't know it needs to flush the Accessed bit into the page tables (where the bit was recently cleared). -- All rights reversed -- 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/ . Don't email: email@kvack.org