From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Stornelli Subject: Re: mount ramdisk rootfs /etc directory to jffs2 filesystem. Date: Wed, 20 Jan 2010 12:54:16 +0100 Message-ID: <2ea1731b1001200354t5ed29458h6fc98c49c1a555d5@mail.gmail.com> References: <20100119095024.GD16182@darwin> <20100119102026.GF16182@darwin> <20100119140600.GH16182@darwin> <2ea1731b1001192357r72d627e2gb36d71f23fd69b2e@mail.gmail.com> <20100120102145.GV16182@darwin> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=LaMWRnCZ5/Rfp6HxbJGDLZq/qnhW7IVBMNRo1WtwVeM=; b=vRavAkOAoDzzrHudgXMlW5sWNt0cCrqKf+t3SVZL1+3JWJa9aKwrFv2ZRbgHDQn5tz yn/Dh+LOpNRXQ3OUI5emjhWtG+F7XLoGRcHJDdjQrk5C1RD9d5V0T0exjTIogADDbGhi ulcT46/3TB4OhrO8hnaTd8YDdq5KPjjLT2MDE= In-Reply-To: <20100120102145.GV16182@darwin> Sender: linux-embedded-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Matthias Kaehlcke Cc: Johnny Hung , Ricard Wanderlof , kernelnewbies , "linux-mtd@lists.infradead.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-embedded@vger.kernel.org" 2010/1/20 Matthias Kaehlcke : > El Wed, Jan 20, 2010 at 08:57:44AM +0100 Marco Stornelli ha dit: > >> 2010/1/20 Johnny Hung : >> > 2010/1/19 Matthias Kaehlcke : >> >> El Tue, Jan 19, 2010 at 02:17:22PM +0100 Ricard Wanderlof ha dit: >> >> >> > I consider to use ramdisk as rootfs because worry about wrong >> > operation in rootfs (is use jffs2 rootfs) and it will cause system >> > boot up failed. >> > Another query, does the syslogd/klogd log files also store in jffs2 >> > rootfs? Write to jffs2 frequently will reduce flash life cycle. >> > >> > BRs, H. Johnny >> >> >> >> -- >> >> In general a good splitting for rootfs could be: squashfs for rootfs, >> tmpfs for volatile data (/tmp), ubifs (with a flash partition) for >> "strong" permanent data (/etc, ....) and pramfs for "light" permanent >> data (/var/log, .....). > > if ubifs is a good choice depends on the size of the partition, iirc > it has a significant overhead for very small partitions. > > once using ubi it could be interesting to set up the read-only rootfs > partition upon ubi in order to spread the wear out over a maximum of blocks. > I don't know the size constraints of Johnny, so it can be useful to use jffs2. Marco