ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

[Mohammad Sadegh Sadri]

Hi all

I have studied the disscussion here mainly by Mirek32 (I think this was the=
 name)  but unfortunately the disscussion is finished without any suitable =
answer and solution.

the 2.6 kernel comes up on ml403 with no problem, it gets an IP address fro=
m my DHCP and mounts the root file system from my NFS server , all of these=
 are ok.=20

Unfortunately , after "freeing unused kernel memory ", init , console stops=
 working however the board is alive because it answers all of my pings corr=
ectly. I tried to make a telnet connection to the board with no success. ( =
I'm using ELDK 4.0)=20

any suggestions what is happening here?

how can I enable the telnet server so that I can make a telnet connection t=
o the board, As I said the board is alive and answers pings but does not pr=
int any thing on the screen.

thanks.
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Re: ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

[Grant Likely]

On 5/23/07, Mohammad Sadegh Sadri <mamsadegh@hotmail.com> wrote:
>
> Hi all
>
> I have studied the disscussion here mainly by Mirek32 (I think this was the name)  but unfortunately the disscussion is finished without any suitable answer and solution.
>
> the 2.6 kernel comes up on ml403 with no problem, it gets an IP address from my DHCP and mounts the root file system from my NFS server , all of these are ok.
>
> Unfortunately , after "freeing unused kernel memory ", init , console stops working however the board is alive because it answers all of my pings correctly. I tried to make a telnet connection to the board with no success. ( I'm using ELDK 4.0)
>
> any suggestions what is happening here?

Is there a /dev/console node?

try booting with init=/bin/sh to see if you get a console.

Your /etc/inittab might not be starting a getty on the console device.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

RE: ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

[Mohammad Sadegh Sadri]

dear grant

As i said i'm using ELDK 4.0 root file system via NFS

ML403 gets IP address from DHCP , mounts the root file system via NFS and t=
hen simply stops printing messages on the screen. The board is alive becaus=
e it answers ping requests.

-- VFS: Mounted root file system (nfs filesystem)
-- Freeing unused kernel memory :108k init
( No more messages after here , hyperterminal does not show anything more )

I have chosen my root file system to be /home/sadri/hld/eldk/ppc_4xx=20
(/home/sadri/hdl/eldk is eldk installation folder )

/eldk/ppc_4xx/dev contains the following node:

crw-rw-rw- 1 root root 5, 1 May 16 09:08 console

and the last line for /etc/inittab is :

# Run gettys in standard runlevels
3:2345:respawn:/sbin/mingetty --noclear console

in addition I passed the init=3D/bin/sh parameter to the kernel with no suc=
cess.=20

the link is auto negotiated at 100MBPS

I'm using OPB UART 16550.=20

I studied the ports by Mirek23 carefully and I know that his problem has be=
en the definition of SDRAM size in xparameters.h , but this is not my probl=
em. I checked that for EDK 9 it is correct.

what is your idea?

thanks
mohammad sadegh.





----------------------------------------
> Date: Wed, 23 May 2007 10:58:28 -0600
> From: grant.likely@secretlab.ca
> To: mamsadegh@hotmail.com
> Subject: Re: ML403 2.6 kernel, root file system on NFS, stops after freei=
ng unused kernel memory
> CC: linuxppc-embedded@ozlabs.org
>=20
> On 5/23/07, Mohammad Sadegh Sadri  wrote:
> >
> > Hi all
> >
> > I have studied the disscussion here mainly by Mirek32 (I think this was=
 the name)  but unfortunately the disscussion is finished without any suita=
ble answer and solution.
> >
> > the 2.6 kernel comes up on ml403 with no problem, it gets an IP address=
 from my DHCP and mounts the root file system from my NFS server , all of t=
hese are ok.
> >
> > Unfortunately , after "freeing unused kernel memory ", init , console s=
tops working however the board is alive because it answers all of my pings =
correctly. I tried to make a telnet connection to the board with no success=
. ( I'm using ELDK 4.0)
> >
> > any suggestions what is happening here?
>=20
> Is there a /dev/console node?
>=20
> try booting with init=3D/bin/sh to see if you get a console.
>=20
> Your /etc/inittab might not be starting a getty on the console device.
>=20
> Cheers,
> g.
>=20
> --=20
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
> grant.likely@secretlab.ca
> (403) 399-0195

_________________________________________________________________
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RE: ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

[Mohammad Sadegh Sadri]

hi

ok! problem solved

problem was kernel command line

mine was:

CONFIG_CMDLINE=3D"console=3DttyS0,9600 console=3Dtty0 root=3D/dev/nfs rw nf=
sroot=3D10.10.10.10:/home/sadri/hdl/eldk_rootfs/ppc_4xx ip=3Ddhcp"

by default 2.6.21 CMDLINE contains two console parameters,=20
the correct one should be=20

CONFIG_CMDLINE=3D"console=3DttyS0,9600 root=3D/dev/nfs rw nfsroot=3D10.10.1=
0.10:/home/sadri/hdl/eldk_rootfs/ppc_4xx ip=3Ddhcp"

well , rootfs comes up until login prompt,
I enter root as the password but it gives "incorrect login" message/

another note:
I changed the memory size to 32Mbytes from 64, I feel the system is more st=
able in this case. some times the system does not come up probperly. ( gene=
rates segmentation fault and similar messages )

thanks


----------------------------------------
> Date: Wed, 23 May 2007 10:58:28 -0600
> From: grant.likely@secretlab.ca
> To: mamsadegh@hotmail.com
> Subject: Re: ML403 2.6 kernel, root file system on NFS, stops after freei=
ng unused kernel memory
> CC: linuxppc-embedded@ozlabs.org
>=20
> On 5/23/07, Mohammad Sadegh Sadri  wrote:
> >
> > Hi all
> >
> > I have studied the disscussion here mainly by Mirek32 (I think this was=
 the name)  but unfortunately the disscussion is finished without any suita=
ble answer and solution.
> >
> > the 2.6 kernel comes up on ml403 with no problem, it gets an IP address=
 from my DHCP and mounts the root file system from my NFS server , all of t=
hese are ok.
> >
> > Unfortunately , after "freeing unused kernel memory ", init , console s=
tops working however the board is alive because it answers all of my pings =
correctly. I tried to make a telnet connection to the board with no success=
. ( I'm using ELDK 4.0)
> >
> > any suggestions what is happening here?
>=20
> Is there a /dev/console node?
>=20
> try booting with init=3D/bin/sh to see if you get a console.
>=20
> Your /etc/inittab might not be starting a getty on the console device.
>=20
> Cheers,
> g.
>=20
> --=20
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
> grant.likely@secretlab.ca
> (403) 399-0195

_________________________________________________________________
Invite your mail contacts to join your friends list with Windows Live Space=
s. It's easy!
http://spaces.live.com/spacesapi.aspx?wx_action=3Dcreate&wx_url=3D/friends.=
aspx&mkt=3Den-us=

Re: ML403 2.6 kernel, root file system on NFS, stops after freeing unused kernel memory

[Clemens Koller]

Hi, Mohammed!

Mohammad Sadegh Sadri schrieb:
> ok! problem solved
> problem was kernel command line
> mine was:
> 
> CONFIG_CMDLINE="console=ttyS0,9600 console=tty0 root=/dev/nfs rw nfsroot=10.10.10.10:/home/sadri/hdl/eldk_rootfs/ppc_4xx ip=dhcp"
> 
> by default 2.6.21 CMDLINE contains two console parameters, 
> the correct one should be 
> 
> CONFIG_CMDLINE="console=ttyS0,9600 root=/dev/nfs rw nfsroot=10.10.10.10:/home/sadri/hdl/eldk_rootfs/ppc_4xx ip=dhcp"
> 
> well , rootfs comes up until login prompt,
> I enter root as the password but it gives "incorrect login" message/

I have had the same symptoms.
Some device node was missing. I guess it was something like:

crw--w--w- 1 root tty      5,   1 May  1 09:30 console
crw-rw-rw- 1 root tty      5,   0 May 27 10:14 tty

Also check
-----8<-----
#
# /etc/securetty: defines which devices root can log in on
#

console
ttyS0
tty1
tty2
tty3
tty4
tty5
tty6

# End of file
-----8<-----

Greets,

Clemens Koller
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