From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2198058-1520522870-2-6418886397220923200 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='at', MailFrom='org' X-Spam-charsets: plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520522870; b=G4VRrmUkagPdyuIkyN8nBdAzNEh5KaBihf6OZ7bLn6Kex+N hL6Gws5y+z8iIOYcp80MUc9SsR836gM/qSdJG14iJVQ8mvK/ljcjvvOebXacQm2k dOAelDiajmjRfLy0yyRvBmdu0fykBzfPsc6Urov3i3iU8ihEUfCP9KwGXgnniZB4 YXmQvMjA0m5E/U7SPlDiehr0H7b5dEZ3q/E1ygZ5r8CGNGF2iY9lXnz0gqI3s6Nh zUzIveZ2i9rakCEY+7wZ6iKf8nt0cw4jgDodxRJ7Ex2LL977pYiritVVl4o30ToV XkzIfx4uvJZcpj9jFLxFloVx19bRiIFyrM2T6eg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding :content-type:sender:list-id; s=arctest; t=1520522870; bh=q0wfVT 4xcZY6q+8mCkTPIxQptqFSy7+T93gh7iolaHk=; b=edirpOedFoKEsOixe0JNow c9cVbSn4f9sfkQfs3vCBj5NCQLYlA9U/rSaVrY0NUlNr/4o4WCs6k7qLxXSY5/l0 MvbRGMthnLW62EgysHOQJIYqVQgcIsdSvRzO36vxTkqcWez6rtKvnD1/BK+q6eFV 1SS3wrYnK2unzVHF+HkY1DpIkKL+W411j8ldBEuHBHjiEdfB/hZcI4porEbPUYIe AIazuGQyTIgMNjp3rgCFJeJeTgbp/gUFAy7TP0cP5v+RN5lMvxsBbQRaKx19ETHq PMfSZ7Bjyx3oveeGMP8OJN0mnPPqh1a+NKx5tKmOaOiOB1jBzOKZxcqnlwb0P+Fw == ARC-Authentication-Results: i=1; mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=nod.at; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=-100 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=nod.at header.result=pass header_is_org_domain=yes Authentication-Results: mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=nod.at; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=-100 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=nod.at header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932537AbeCHP1r convert rfc822-to-8bit (ORCPT ); Thu, 8 Mar 2018 10:27:47 -0500 Received: from lilium.sigma-star.at ([109.75.188.150]:48682 "EHLO lilium.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754846AbeCHP1q (ORCPT ); Thu, 8 Mar 2018 10:27:46 -0500 From: Richard Weinberger To: dedekind1@gmail.com Cc: Linus Walleij , linux-mtd@lists.infradead.org, "linux-kernel@vger.kernel.org" , Cyrille Pitchen , Mark Vasut , Boris BREZILLON , Brian Norris , David Woodhouse , tharvey@gateworks.com, stable , Ulf Hansson Subject: Re: [PATCH] ubi: Reject MLC NAND Date: Thu, 08 Mar 2018 16:28:50 +0100 Message-ID: <10429741.dU3vzh71GH@blindfold> In-Reply-To: <1520521275.20980.41.camel@gmail.com> References: <20180303104554.5958-1-richard@nod.at> <3797589.z8fAhu5iDP@blindfold> <1520521275.20980.41.camel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Artem, Am Donnerstag, 8. März 2018, 16:01:15 CET schrieb Artem Bityutskiy: > On Thu, 2018-03-08 at 15:43 +0100, Richard Weinberger wrote: > > As stated by David Woodhouse, it was a huge mistake by UBI to not > > reject MLC > > NAND from the very beginning. > > Correction: when we were developing UBI/UBIFS and upstreamed them, MLC > was widely used yet we did not really know about it. So there was > nothing to reject yet. You mean *not* widely used? > The mistake is that we did not add the reject timely. When people > started reporting MLC issues we were answering that UBI/UBIFS stack > needs more work to make MLC safe to use, and we hoped someone would do > the work. True. TBH Boris and I also thought that adding MLC support is not a that big deal... Thanks, //richard