From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f197.google.com (mail-qt0-f197.google.com [209.85.216.197]) by kanga.kvack.org (Postfix) with ESMTP id 82FE06B0033 for ; Thu, 12 Oct 2017 21:20:54 -0400 (EDT) Received: by mail-qt0-f197.google.com with SMTP id q4so13398977qtq.16 for ; Thu, 12 Oct 2017 18:20:54 -0700 (PDT) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id x3sor11064698qkd.62.2017.10.12.18.20.53 for (Google Transport Security); Thu, 12 Oct 2017 18:20:53 -0700 (PDT) Date: Thu, 12 Oct 2017 21:20:50 -0400 (EDT) From: Nicolas Pitre Subject: RE: [PATCH v6 1/4] cramfs: direct memory access support In-Reply-To: Message-ID: References: <20171012061613.28705-1-nicolas.pitre@linaro.org> <20171012061613.28705-2-nicolas.pitre@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Chris Brandt Cc: Alexander Viro , Christoph Hellwig , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-embedded@vger.kernel.org" , "linux-kernel@vger.kernel.org" On Thu, 12 Oct 2017, Chris Brandt wrote: > On Thursday, October 12, 2017, Nicolas Pitre wrote: > > Small embedded systems typically execute the kernel code in place (XIP) > > directly from flash to save on precious RAM usage. This adds the ability > > to consume filesystem data directly from flash to the cramfs filesystem > > as well. Cramfs is particularly well suited to this feature as it is > > very simple and its RAM usage is already very low, and with this feature > > it is possible to use it with no block device support and even lower RAM > > usage. > > > > Works! > > I first applied the MTD patch series from here: > > http://patchwork.ozlabs.org/project/linux-mtd/list/?series=7504 > > Then this v6 patch series on top of it. > > I created a mtd-rom/direct-mapped partition and was able to both mount after boot, and also boot as the rootfs. > > So far, so good. > > Thank you! > > Tested-by: Chris Brandt Great! Thanks for testing. Hopefully this series has finally addressed all objections that were raised. Nicolas -- 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