From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Mon, 14 Sep 2015 21:34:04 +0200 Subject: [Buildroot] [RFC 3/6] system: add mdev-only /dev management (without devtmpfs) In-Reply-To: <55F6F060.2060901@lucaceresoli.net> References: <1441747734-18730-1-git-send-email-luca@lucaceresoli.net> <1441747734-18730-4-git-send-email-luca@lucaceresoli.net> <20150909132929.5c01433e@free-electrons.com> <55F6F060.2060901@lucaceresoli.net> Message-ID: <20150914213404.4fdd36a5@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Dear Luca Ceresoli, On Mon, 14 Sep 2015 18:05:52 +0200, Luca Ceresoli wrote: > But now I removed that patch, and replaced with a different > implementation based on Arnout's suggestion of using BUSYBOX_DEVICES. I am not sure using BUSYBOX_DEVICES is fully correct. The reason why /dev/console is needed is *not* because of Busybox, but because of the kernel that is opening /dev/console before handing control over to the init application: http://lxr.free-electrons.com/source/init/main.c#L1011 If you do BUSYBOX_DEVICES with just /dev/console, then you will also need a SYSVINIT_DEVICES with just /dev/console. Though I admit my comment here is mainly nitpicking :) > > One thing I dislike a bit is that there is quite a bit overlap between > > S10mdev and activate-mdev. As Arnout suggested, can you just mount a > > tmpfs in /dev in the inittab in the "mdev without devtmpfs" case, and > > then keep the normal S10mdev script? > > v2 will do things this way. Great! Thanks! Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com