From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: Re: 4.14-rc2 on thinkpad x220: out of memory when inserting mmc card Date: Tue, 3 Oct 2017 09:27:30 +0300 Message-ID: <184b3552-851c-7015-dd80-76f6eebc33cc@intel.com> References: <20170905194739.GA31241@amd> <20171001093704.GA12626@amd> <20171001102647.GA23908@amd> <201710011957.ICF15708.OOLOHFSQMFFVJt@I-love.SAKURA.ne.jp> <72c93a69-610f-027e-c028-379b97b6f388@intel.com> <20171002084131.GA24414@amd> <20171002130353.GA25433@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: Received: from mga04.intel.com ([192.55.52.120]:62894 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750767AbdJCGeQ (ORCPT ); Tue, 3 Oct 2017 02:34:16 -0400 In-Reply-To: <20171002130353.GA25433@amd> Content-Language: en-US Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Pavel Machek , Linus Walleij Cc: Tetsuo Handa , "linux-kernel@vger.kernel.org" , "linux-mmc@vger.kernel.org" , linux-mm@kvack.org On 02/10/17 16:03, Pavel Machek wrote: > On Mon 2017-10-02 14:06:03, Linus Walleij wrote: >> On Mon, Oct 2, 2017 at 10:41 AM, Pavel Machek wrote: >> >>>> Bounce buffers are being removed from v4.15 >> >> As Adrian states, this would make any last bugs go away. I would >> even consider putting this patch this into fixes if it solves the problem. >> >>> although you may experience >>>> performance regression with that: >>>> >>>> https://marc.info/?l=linux-mmc&m=150589778700551 >>> >>> Hmm. The performance of this is already pretty bad, I really hope it >>> does not get any worse. >> >> Did you use bounce buffers? Those were improving performance on >> some laptops with TI or Ricoh host controllers and nothing else was >> ever really using it (as can be seen from the commit). > > Thinkpad X220... how do I tell if I was using them? I believe so, > because I uncovered bug in them before. You are certainly using bounce buffers. What does lspci -knn show?