From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id 0BD4E9000BD for ; Wed, 28 Sep 2011 20:09:37 -0400 (EDT) Received: from hpaq11.eem.corp.google.com (hpaq11.eem.corp.google.com [172.25.149.11]) by smtp-out.google.com with ESMTP id p8T09Zc7000402 for ; Wed, 28 Sep 2011 17:09:35 -0700 Received: from qyg14 (qyg14.prod.google.com [10.241.82.142]) by hpaq11.eem.corp.google.com with ESMTP id p8T09XSJ027937 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 28 Sep 2011 17:09:34 -0700 Received: by qyg14 with SMTP id 14so201378qyg.16 for ; Wed, 28 Sep 2011 17:09:33 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20110928161805.8acb33c5.kamezawa.hiroyu@jp.fujitsu.com> References: <1317170947-17074-1-git-send-email-walken@google.com> <1317170947-17074-4-git-send-email-walken@google.com> <20110928161805.8acb33c5.kamezawa.hiroyu@jp.fujitsu.com> Date: Wed, 28 Sep 2011 17:09:32 -0700 Message-ID: Subject: Re: [PATCH 3/9] kstaled: page_referenced_kstaled() and supporting infrastructure. From: Michel Lespinasse Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Dave Hansen , Rik van Riel , Balbir Singh , Peter Zijlstra , Andrea Arcangeli , Johannes Weiner , KOSAKI Motohiro , Hugh Dickins , Michael Wolf On Wed, Sep 28, 2011 at 12:18 AM, KAMEZAWA Hiroyuki wrote: > 2 questions. > > What happens at Transparent HugeTLB pages are splitted/collapsed ? Nothing special - at the next scan, pages are counted again considering their new size. > Does this feature can ignore page migration i.e. flags should not be copied ? We're not doing it currently. As I understand, the migrate code does not copy the PTE young bits either, nor does it try to preserve page order in the LRU lists. So it's not transparent to the LRU algorithms, but it does not cause incorrect behavior either. -- Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- 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