From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga14.intel.com ([192.55.52.115]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XmlUw-0001Qo-Cn for linux-mtd@lists.infradead.org; Fri, 07 Nov 2014 15:30:50 +0000 Message-ID: <1415374224.22887.24.camel@sauron.fi.intel.com> Subject: Re: [PATCH V2] mtd: block2mtd: Present block2mtd timely on boot time From: Artem Bityutskiy Reply-To: dedekind1@gmail.com To: Felix Fietkau Date: Fri, 07 Nov 2014 17:30:24 +0200 In-Reply-To: <545CE335.8020503@openwrt.org> References: <371358190.34795877.1410204429882.JavaMail.zimbra@redhat.com> <1444809468.34812041.1410206680931.JavaMail.zimbra@redhat.com> <20140909170231.GA14429@logfs.org> <1807144344.40128259.1410985683342.JavaMail.zimbra@redhat.com> <20141105202303.GN23619@ld-irv-0074> <1415372340.22887.23.camel@sauron.fi.intel.com> <545CE335.8020503@openwrt.org> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Cc: =?ISO-8859-1?Q?J=F6rn?= Engel , Herton Krzesinski , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, Rodrigo Freire , Brian Norris , dwmw2@infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2014-11-07 at 16:20 +0100, Felix Fietkau wrote: > > The only usage of this driver is emulating a block device on top of NOR > > flash, and in most cases, only for debugging / research purposes. This > > is because (a) this driver does not handle bad blocks (and hence, > > NAND-incompatible) and (b) it does read-erase-write when you modify a > > block, so it is extremely slow and does not handle power cuts at all. > I think you got things mixed up a bit. This is not about emulating a > block device on top of NOR flash. This is about emulating NOR flash on > top of a regular block device - e.g. USB sticks, SD cards. Gosh, I'm sorry, you are right. I did mix things up, please, ignore my e-mail.