[linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

2 messages, 2 authors, 2007-08-31 · open the first message on its own page

[linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

From: <hidden>
Date: 2007-08-31 15:58:10

Hello,

I am porting linux kernel 2.6.19 on a platform based on PPC750FX together 
with a Marvell GT64260.
I use a patched 643xx driver which is back ported to 64260 by Steven J. 
Hill.
I have ethernet now up and running, but only if I switch debug on, which 
generates a big bunch of screen messages.
As soon as I switch debug off, I get the message "Virtual device %s asks 
to queue packet!" on every transmission request.

This happens on ping an other system.

Has anyone experience in such an event? Is there anything how I can speed 
up performance with the 64260?
Is there a similar problem known with the 64360?

Thanks in advance.
Joachim



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Re: [linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

From: Dale Farnsworth <hidden>
Date: 2007-08-31 16:43:43

I am porting linux kernel 2.6.19 on a platform based on PPC750FX together 
with a Marvell GT64260.
I use a patched 643xx driver which is back ported to 64260 by Steven J. 
Hill.
I have ethernet now up and running, but only if I switch debug on, which 
generates a big bunch of screen messages.
As soon as I switch debug off, I get the message "Virtual device %s asks 
to queue packet!" on every transmission request.

This happens on ping an other system.

Has anyone experience in such an event? Is there anything how I can speed 
up performance with the 64260?
Is there a similar problem known with the 64360?
No, this does not happen on the mv64360.  As I recall, that message occurs
when something attempts to queue a packet to a driver that has called
netif_stop_queue() but hasn't yet called netif_wake_queue().  I would
guess that when you turn debug on, you are changing the driver logic
in addition to the timing.

-Dale
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