[gentoo-embedded] mdev problems

[gentoo-embedded] mdev problems

[Pierre Cassimans]

Hi,

i would like to use mdev on my device, but got some problems implementing 
it. First of all the device is booted over the network with pxe and the root 
is mounted over nfs read only.

If i use the normal baselayout, i can boot the device and login without 
problems.

I wanted to mount the /dev dir read/write so i can use mdev to populate the 
dir. I tried it with mount -n -t ramfs none /dev in the inittab, but now the 
system hangs right after "Freeing unused kernel memory".

Here are my config files:

/etc/inittab:
=======
# Startup the system
#null::sysinit:/bin/mount -o remount,rw /
null::sysinit:/bin/mount -t proc none /proc
null::sysinit:/bin/mount -t sysfs none /sys
null::sysinit:/bin/mount -n -t ramfs none /dev
null::sysinit:/bin/mkdir /dev/pts
null::sysinit:/bin/mount -t devpts -o gid=4,mode=620 none /dev/pts
null::sysinit:/bin/mount -t tmpfs none /dev/shm
null::sysinit:/bin/mount -a
null::sysinit:/sbin/mdev -s
null::sysinit:/bin/hostname -F /etc/hostname
null::sysinit:/sbin/ifconfig lo 127.0.0.1 up
null::sysinit:/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
# now run any rc scripts
::sysinit:/etc/init.d/rcS

# Set up a couple of getty's
tty1::respawn:/sbin/getty 38400 tty1
#tty2::respawn:/sbin/getty 38400 tty2

# Put a getty on the serial port
#ttyS0::respawn:/sbin/getty -L ttyS0 115200 vt100

# Logging junk
null::sysinit:/bin/touch /var/log/messages
#null::respawn:/sbin/syslogd -n -m 0
null::respawn:/sbin/klogd -n
#tty3::respawn:/bin/tail -f /var/log/messages

# Stuff to do for the 3-finger salute
::ctrlaltdel:/sbin/reboot

# Stuff to do before rebooting
null::shutdown:/etc/init.d/rcK
null::shutdown:/bin/killall klogd
null::shutdown:/bin/killall syslogd
null::shutdown:/bin/umount -a -r
null::shutdown:/sbin/swapoff -a


/etc/mdev.conf
=========
SLEEP=10

MAKEDEV -> ../sbin/MAKEDEV
/proc/core -> kcore
fd -> /proc/self/fd
ram -> ram1
stderr -> fd/2
stdin -> fd/0
stdout -> fd/1
vbi -> vbi0
video -> video0

null 0:0 777
zero 0:0 666

urandom 0:0 444
console 0:5 0600
fd0 0:11 0660
kmem 0:9 000
mem 0:9 0640
port 0:9 0640
ptmx 0:5 0660

tty 0:5 0660

tty0* 0:5 0660
tty1* 0:5 0660
tty2* 0:5 0660

ttyS* 0:20 640


i'm using Busybox-1.1.2 and uclibc-0.9.28

Any help would be appriciated :)

Pierre


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Re: [gentoo-embedded] mdev problems

[Ned Ludd]

On Thu, 2006-05-11 at 19:37 +0000, Pierre Cassimans wrote:
> Hi,
> 
> i would like to use mdev on my device, but got some problems implementing 
> it. First of all the device is booted over the network with pxe and the root 
> is mounted over nfs read only.
> 
> If i use the normal baselayout, i can boot the device and login without 
> problems.
> 
> I wanted to mount the /dev dir read/write so i can use mdev to populate the 
> dir. I tried it with mount -n -t ramfs none /dev in the inittab, but now the 
> system hangs right after "Freeing unused kernel memory".
> 
> Here are my config files:
> 
> /etc/inittab:
> =======
> # Startup the system
> #null::sysinit:/bin/mount -o remount,rw /
> null::sysinit:/bin/mount -t proc none /proc
> null::sysinit:/bin/mount -t sysfs none /sys
> null::sysinit:/bin/mount -n -t ramfs none /dev
> null::sysinit:/bin/mkdir /dev/pts
> null::sysinit:/bin/mount -t devpts -o gid=4,mode=620 none /dev/pts
> null::sysinit:/bin/mount -t tmpfs none /dev/shm
> null::sysinit:/bin/mount -a
> null::sysinit:/sbin/mdev -s
> null::sysinit:/bin/hostname -F /etc/hostname
> null::sysinit:/sbin/ifconfig lo 127.0.0.1 up
> null::sysinit:/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
> # now run any rc scripts
> ::sysinit:/etc/init.d/rcS
> 
> # Set up a couple of getty's
> tty1::respawn:/sbin/getty 38400 tty1
> #tty2::respawn:/sbin/getty 38400 tty2
> 
> # Put a getty on the serial port
> #ttyS0::respawn:/sbin/getty -L ttyS0 115200 vt100
> 
> # Logging junk
> null::sysinit:/bin/touch /var/log/messages
> #null::respawn:/sbin/syslogd -n -m 0
> null::respawn:/sbin/klogd -n
> #tty3::respawn:/bin/tail -f /var/log/messages
> 
> # Stuff to do for the 3-finger salute
> ::ctrlaltdel:/sbin/reboot
> 
> # Stuff to do before rebooting
> null::shutdown:/etc/init.d/rcK
> null::shutdown:/bin/killall klogd
> null::shutdown:/bin/killall syslogd
> null::shutdown:/bin/umount -a -r
> null::shutdown:/sbin/swapoff -a
> 
> 
> /etc/mdev.conf
> =========
> SLEEP=10
That line is a debug line. Does not exist or do anything.

> 
> MAKEDEV -> ../sbin/MAKEDEV
> /proc/core -> kcore
> fd -> /proc/self/fd
> ram -> ram1
> stderr -> fd/2
> stdin -> fd/0
> stdout -> fd/1
> vbi -> vbi0
> video -> video0
> 
> null 0:0 777
> zero 0:0 666
> 
> urandom 0:0 444
> console 0:5 0600
> fd0 0:11 0660
> kmem 0:9 000
> mem 0:9 0640
> port 0:9 0640
> ptmx 0:5 0660
> 
> tty 0:5 0660
> 
> tty0* 0:5 0660
> tty1* 0:5 0660
> tty2* 0:5 0660
> 
> ttyS* 0:20 640
> 
> 
> i'm using Busybox-1.1.2 and uclibc-0.9.28


there might be a bug in 0.9.28 with getdents(). Mike would know best.

> 
> Any help would be appriciated :)
> 
> Pierre
> 
> 
-- 
Ned Ludd <solar@gentoo.org>
Gentoo Linux

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Re: [gentoo-embedded] mdev problems

[Mike Frysinger]

On Thursday 11 May 2006 15:55, Ned Ludd wrote:
> On Thu, 2006-05-11 at 19:37 +0000, Pierre Cassimans wrote:
> > i'm using Busybox-1.1.2 and uclibc-0.9.28
>
> there might be a bug in 0.9.28 with getdents(). Mike would know best.

looks like i included the patch but never released it

http://sources.gentoo.org/gentoo/src/patchsets/uclibc/0.9.28/48_all_uClibc-svn-getdents.patch?rev=1.1&view=markup
-mike
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Re: [gentoo-embedded] mdev problems

[Pierre Cassimans]

Hi,

i applied the patch, compiled uclibc in my uclibc-chroot, recompiled busybox 
and ROOT=/blah emerge -K uclibc busybox.
Then i chroot /blah /bin/busybox --install -s
and restarted the device, but still nothing. how do i know if the patch was 
well applied and that the right version is installed on the device? can i 
test it in an other way then to let my device hang :p
Did i forget to do a compilation of something other important thing to make 
it work?

Pierre

>From: Mike Frysinger <vapier@gentoo.org>
>Reply-To: gentoo-embedded@lists.gentoo.org
>To: gentoo-embedded@lists.gentoo.org
>Subject: Re: [gentoo-embedded] mdev problems
>Date: Thu, 11 May 2006 22:53:07 -0400
>
>On Thursday 11 May 2006 15:55, Ned Ludd wrote:
> > On Thu, 2006-05-11 at 19:37 +0000, Pierre Cassimans wrote:
> > > i'm using Busybox-1.1.2 and uclibc-0.9.28
> >
> > there might be a bug in 0.9.28 with getdents(). Mike would know best.
>
>looks like i included the patch but never released it
>
>http://sources.gentoo.org/gentoo/src/patchsets/uclibc/0.9.28/48_all_uClibc-svn-getdents.patch?rev=1.1&view=markup
>-mike
>--
>gentoo-embedded@gentoo.org mailing list
>


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