From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f182.google.com (mail-pd0-f182.google.com [209.85.192.182]) by kanga.kvack.org (Postfix) with ESMTP id 5D82C6B0031 for ; Mon, 23 Jun 2014 21:12:55 -0400 (EDT) Received: by mail-pd0-f182.google.com with SMTP id y13so6310122pdi.13 for ; Mon, 23 Jun 2014 18:12:54 -0700 (PDT) Received: from lgemrelse7q.lge.com (LGEMRELSE7Q.lge.com. [156.147.1.151]) by mx.google.com with ESMTP id to10si24021905pbc.228.2014.06.23.18.12.53 for ; Mon, 23 Jun 2014 18:12:54 -0700 (PDT) Message-ID: <53A8D092.4040801@lge.com> Date: Tue, 24 Jun 2014 10:12:50 +0900 From: Gioh Kim MIME-Version: 1.0 Subject: [RFC] CMA page migration failure due to buffers on bh_lru Content-Type: text/plain; charset=EUC-KR Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Nazarewicz , Marek Szyprowski , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Joonsoo Kim , Mel Gorman , =?EUC-KR?B?wMywx8ij?= Hello, I am trying to apply CMA feature for my platform. My kernel version, 3.10.x, is not allocating memory from CMA area so that I applied a Joonsoo Kim's patch (https://lkml.org/lkml/2014/5/28/64). Now my platform can use CMA area effectively. But I have many failures to allocate memory from CMA area. I found the same situation to Laura Abbott's patch descrbing, https://lkml.org/lkml/2012/8/31/313, that releases buffer-heads attached at CPU's LRU list. If Joonsoo's patch is applied and/or CMA feature is applied more and more, buffer-heads problem is going to be serious definitely. Please look into the Laura's patch again. I think it must be applied with Joonsoo's patch. -- 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