2.4 Kernel for mpc860

2.4 Kernel for mpc860

[Thomas]

Hi all.
I want to compile 2.4 for my custom board with
a mpc860. Which source tree should I base my
kernel on?

Regards,
/Thomas Lange/


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Re: 2.4 Kernel for mpc860

[Borlizzi Giacomo]

Hi,
I have same problem. It is not clear wich is better.
I'm trying to adapt to my board in this days the linux-2.4.0-test9, previous
version was 2.2.13
but now?
/Giacomo Borlizzi



Thomas wrote:

> Hi all.
> I want to compile 2.4 for my custom board with
> a mpc860. Which source tree should I base my
> kernel on?
>
> Regards,
> /Thomas Lange/
>


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405GP f_dentry panics

[Glenn Toshi Martin]

Hi all,

We have a custom 405GP board and the "Walnut" board. We are using the
2.4-test2 (Version released Nov 26 2000) kernel supplied via the Montavista
web site. Our custom board has an IDE harddisk while the Walnut board uses
NFS. We are experiencing f_dentry = 0 problems when untarring a 750 MB file
(This seems to lead to memory corruption and hence kernel panics). The
problem is more pronounced when using the IDE but nevertheless occurs when
using the Walnut board over NFS. This appears to be a known problem, but
would like to know whether the problem can be fixed, and if so what is
required to fix it? Or is there a better workaround to the ones currently
available?
We have another problem that may relate to the above. During the untar
process of large files including the one mentioned above, we get a file
system error "Could not write to file: bad file descriptor" every now and
then (both NFS and IDE, more frequently on the IDE). Could anyone shed light
on this problem?

Thanks

Glenn


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Re: 405GP f_dentry panics

[Frank Rowand]

Glenn Toshi Martin wrote:
>
> Hi all,
>
> We have a custom 405GP board and the "Walnut" board. We are using the
> 2.4-test2 (Version released Nov 26 2000) kernel supplied via the Montavista
> web site. Our custom board has an IDE harddisk while the Walnut board uses
> NFS. We are experiencing f_dentry = 0 problems when untarring a 750 MB file
> (This seems to lead to memory corruption and hence kernel panics). The
> problem is more pronounced when using the IDE but nevertheless occurs when
> using the Walnut board over NFS. This appears to be a known problem, but
> would like to know whether the problem can be fixed, and if so what is
> required to fix it? Or is there a better workaround to the ones currently
> available?
> We have another problem that may relate to the above. During the untar
> process of large files including the one mentioned above, we get a file
> system error "Could not write to file: bad file descriptor" every now and
> then (both NFS and IDE, more frequently on the IDE). Could anyone shed light
> on this problem?
>
> Thanks
>
> Glenn

We didn't implement the "f_dentry == 0" workarounds everywhere that the problem
could manifest itself.  We just implemented it opportunistically in places
where we saw the problem under stress testing.  We expect the problem to be
resolved when we move up to 2.4.0 (I'm doing the merge now...).  If you want
to mask the problem in the interim, you need to search out all places
where f_dentry is dereferenced and check for the value of zero before
allowing the dereference.

-Frank
--
Frank Rowand <frank_rowand@mvista.com>
MontaVista Software, Inc

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Booting MCP750 stand alone

[Tom Shaver]

Is it possible to boot MVista Linux on a Motorola MCP750 without a
bootp/tftp server? ie, off of the on board flash, or possibly a compact
flash card?

Thanks,
Tom Shaver
Electrical Engineer
Planning Systems Inc.


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Re: Booting MCP750 stand alone

[Matt Porter]

On Thu, Jan 18, 2001 at 01:35:20PM -0600, Tom Shaver wrote:
>
> Is it possible to boot MVista Linux on a Motorola MCP750 without a
> bootp/tftp server? ie, off of the on board flash, or possibly a compact
> flash card?

Of course, otherwise how would you deploy an MCP750 system? :)

Booting out of the onboard flash is mentioned in the README, you
need to use the BugBoot utility.

IDE is supported so the device in the onboard CF socket will show
up as hda.  Make a type 41 PReP partition on there, dd a kernel
directly into the partition.  Reboot and do a 'pboot 14' at the
PPCBUG prompt.

Oh yes, make sure you populate an initrd or CF partition with the
HHL filesystem to root off of.

--
Matt Porter
MontaVista Software, Inc.
mporter@mvista.com

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