Stability of network/io on MPC8540ADS?

[Yuji Nishimura]

Hi Kumar ,

You can check same patch on your internal SF server (Motorola internal).
I uploaded patch on 5/6 or 5/7.
Please check it...

Best Regards,
Yuji Nishimura -Tokyo Japan (rty922 at email.sps.mot.com)


Kumar Gala wrote:

> Y.Nishimura ,
>
> It looks like the patch was not included in your email. I would
> appreciate seeing it and evaluating if it is something we should
> include in the stock kernel.
>
> - kumar
>
> On May 14, 2004, at 1:54 PM, Yuji Nishimura wrote:
>
>>
>> Helo Stefan,
>>
>> I evaluated MPC8540ADS and found out similar problem few weeks ago. I
>> made tiny patch and it works well.
>> I also evaluated with NEC ehci pci device. The result was fine.
>> I wrote 1GB data to external usb-2.0 HDD via USB-2.0(ehci), that
>> works well.
>> I also try to use ftp(MPC8540=server) and transfer (R/W) 2047MB data via
>> TSEC(gianfar) and it also works well.
>> If you try to use this patch, please let me know. I think patch requires
>> more evaluation...
>>
>> Best Regards,
>> Y.Nishimura - Tokyo, Japan.
>>
>>
>>
>> Stefan Nickl wrote:
>>
>>> Hello,
>>>
>>> since the linuxppc-2.4 port to our custom 8540 board
>>> has made some progress now, I went back to the ADS
>>> board for some cross-checking.
>>>
>>> I've experienced several reproducible lockups that
>>> are triggered by heavy IO and/or networking.
>>>
>>> Kernel is vanilla linuxppc-2.4.27-pre2, gcc 3.2.3,
>>> root=/dev/nfs (Gentoo -Os -mcpu=603e)
>>>
>>> 1) Using netcat to write data over tcp:
>>> cat /dev/zero | nc lucy 3000
>>>
>>> "lucy" is running "nc -l -p 3000 |pipeworks > /dev/null"
>>> This freezes the ADS after a few seconds.
>>>
>>> 2) Writing to the nfsroot server:
>>> cat /dev/urandom > /test
>>>
>>> The same. Reading seems ok.
>>>
>>> 3) Writing to a USB2.0 HDD connected via PCI
>>> interface board (OHCI compatible).
>>>
>>> Lockup after ~70MB of writing
>>>
>>> I haven't tested explicitly, but the kernel that
>>> was shipped with the board (some 2.4.20?) didn't
>>> seem to have such problems.
>>>
>>> Any ideas?
>>>
>>> --
>>> Stefan Nickl
>>> Kontron Modular Computers
>>>
>>>
>>>
>>
>>
>
>
>


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