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	Fri, 26 Dec 2014 09:14:24 +0000 (UTC)
Date: Fri, 26 Dec 2014 10:14:21 +0100
From: Natanael Copa <ncopa@alpinelinux.org>
To: Isaac Dunham <ibid.ag@gmail.com>
Cc: alpine-devel@lists.alpinelinux.org
Subject: Re: [alpine-devel] busybox-1.23 in edge
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On Fri, 26 Dec 2014 09:05:15 +0100
Natanael Copa <ncopa@alpinelinux.org> wrote:

> On Thu, 25 Dec 2014 16:12:32 -0800
> Isaac Dunham <ibid.ag@gmail.com> wrote:
> 
> > On Thu, Dec 25, 2014 at 08:58:35PM +0100, Natanael Copa wrote:
> > > Hi,
> > > 
> > > I pushed busybox 1.23 to edge. So far I found at least one regression[1]
> > > in ash and possibly another in modprobe.
> > > 
> > > After upgrading my laptop (both new kernel and new busybox) it didn't
> > > load the ahci kernel module from initramfs so the harddisks was not
> > > found. I don't know if this is due to something in new busybox or in
> > > new kernel or if it affects other hardware.
> 
> It did happen on my desktop too and I have a theory on whats going on.

...
 
> I think what happens is that if a slash (/) is found in the probe name,
> modprobe will simply exit. We call it with: modprobe -a <alias1> <alias2> ...
> 
> So it means it will load all modules up to first alias which contains a
> slash and then stop.
> 
> ncopa-desktop:~# find /sys -name uevent -exec grep -h MODALIAS= '{}' + 2>/dev/null | sort -u | grep -E 'pci|/' 
> MODALIAS=dmi:bvnDellInc.:bvrA07:bd09/10/2011:svnDellInc.:pnOptiPlex790:pvr01:rvnDellInc.:rn0HY9JP:rvrA00:cvnDellInc.:ct6:cvr:
> MODALIAS=pci:v00008086d00000100sv00001028sd000004ADbc06sc00i00
> MODALIAS=pci:v00008086d00000102sv00001028sd000004ADbc03sc00i00
> ...
> 
> As you see, there are slashes in the dmi module and since we sort, dmi
> will always come before pci. So the disk controllers are never loaded
> and disks never found.
> 
> I think we should revert the upstream commit for now.

I pushed a temp fix for busybox for now. I also bumped pkgrel for
mkinitfs to force a regeneration with fixed busybox.

The fixed was tested with success in qemu.

Thanks!

-nc


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