From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751522AbdJBNEB (ORCPT ); Mon, 2 Oct 2017 09:04:01 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:37918 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751036AbdJBNDz (ORCPT ); Mon, 2 Oct 2017 09:03:55 -0400 Date: Mon, 2 Oct 2017 15:03:53 +0200 From: Pavel Machek To: Linus Walleij Cc: Adrian Hunter , Tetsuo Handa , "linux-kernel@vger.kernel.org" , "linux-mmc@vger.kernel.org" , linux-mm@kvack.org Subject: Re: 4.14-rc2 on thinkpad x220: out of memory when inserting mmc card Message-ID: <20171002130353.GA25433@amd> 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> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UugvWAfsgieZRqgk" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --UugvWAfsgieZRqgk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon 2017-10-02 14:06:03, Linus Walleij wrote: > On Mon, Oct 2, 2017 at 10:41 AM, Pavel Machek wrote: >=20 > >> Bounce buffers are being removed from v4.15 >=20 > 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. >=20 > > although you may experience > >> performance regression with that: > >> > >> https://marc.info/?l=3Dlinux-mmc&m=3D150589778700551 > > > > Hmm. The performance of this is already pretty bad, I really hope it > > does not get any worse. >=20 > 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. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --UugvWAfsgieZRqgk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlnSOTkACgkQMOfwapXb+vLC7QCZAfSSy+2u+u9pvrLC579qxsqd kM4An1/hp9y9gOLAHZ4nUdVxRMlPs0+k =iLSc -----END PGP SIGNATURE----- --UugvWAfsgieZRqgk--