Re: Always install initramfs-framework-base in case of linux-yocto & INITRAMFS_IMAGE_BUNDLE=1

From: Andrea Adami <andrea.adami@gmail.com>
To: Alexey Brodkin <alexey.brodkin@synopsys.com>
Cc: Patches and discussions about the oe-core layer
	<openembedded-core@lists.openembedded.org>
Subject: Re: Always install initramfs-framework-base in case of linux-yocto & INITRAMFS_IMAGE_BUNDLE=1
Date: Thu, 7 Feb 2019 15:25:33 +0100	[thread overview]
Message-ID: <CAAQYJAsCYPP88dCGY_=4mKE9rPGuw6za01tw-CB7D7VCZ7xYeg@mail.gmail.com> (raw)
In-Reply-To: <4881796E12491D4BB15146FE0209CE64681D54A2@DE02WEMBXB.internal.synopsys.com>

On Wed, Feb 6, 2019 at 4:54 PM Alexey Brodkin
<alexey.brodkin@synopsys.com> wrote:
>
> Hi Leon,
>
> > -----Original Message-----
> > From: Leon Woestenberg <leon@sidebranch.com>
> > Sent: Friday, February 1, 2019 12:18 AM
> > To: Alexey Brodkin <alexey.brodkin@synopsys.com>
> > Cc: Patches and discussions about the oe-core layer <openembedded-core@lists.openembedded.org>
> > Subject: Re: [OE-core] Always install initramfs-framework-base in case of linux-yocto &
> > INITRAMFS_IMAGE_BUNDLE=1
> >
> > On Tue, Jan 29, 2019 at 9:01 PM Alexey Brodkin
> > <alexey.brodkin@synopsys.com> wrote:
> > > --------------------------->8----------------------
> > > /dev/console is missing or not a character device!
> > > Please ensure your rootfs is properly configured
> > > --------------------------->8----------------------
> >
> > I thought /dev/console could also be created by the kernel itself onto
> > a "temporary filesystem for device nodes" (DEVTMPFS).
> > I am not sure, but here is a similar case:
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.busybox.net_pipermail_buildroot_2015-
> > 2DMarch_123309.html&d=DwIBaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=lqdeeSSEes0GFDDl656eViXO7breS55ytWkhpk5R81I&m=
> > 9xab_6OSIxhk6sCiqSFEwTUASBIaA_-C_wGiSMfJn3o&s=SJ9X7QVWrd1gCdyBsL9fdY841I4qG2y47VH3Sw-IRF4&e=
> >
> > Is your (other) kernel configured with CONFIG_DEVTMPFS=y?
>
> Indeed it is.
>
> The problem is devtmpfs is auto-mounted in prepare_namespace() which
> is not executed in case of initramfs because in case of initramfs we
> expect its "/init" will do everything itself, see [1].

Hi,
I jump in because I was at the same point years ago [1]: the issue
here is basically the linux-yocto specific patch adding the check for
console.
It was simply reverted in our case...

Cheers
Andrea

[1]
http://cgit.openembedded.org/meta-openembedded/commit/meta-initramfs/recipes-kernel?id=7183bacd5c866d433467a750e485e6c01af4aafc

>
> That said enabling CONFIG_DEVTMPFS_MOUNT doesn't help with initramfs too.
> So I don't see any other solution except disabling this check in case
> of enabled CONFIG_BLK_DEV_INITRD, see [2].
>
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/early-userspace/README#n140
> [2] https://lists.yoctoproject.org/pipermail/linux-yocto/2019-February/007552.html
>
> -Alexey
>
>
> --
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