netdev - RE: [net-next 02/11] e1000: Adding e1000

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Date:	Wed, 8 Feb 2012 18:39:30 +0000
From:	"Dave, Tushar N" <tushar.n.dave@...el.com>
To:	Michal Kubecek <mkubecek@...e.cz>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>,
	"jbeulich@...e.com" <jbeulich@...e.com>
Subject: RE: [net-next 02/11] e1000: Adding e1000_dump function

>-----Original Message-----
>From: Michal Kubeček [mailto:mkubecek@...e.cz]
>Sent: Tuesday, February 07, 2012 9:38 AM
>To: netdev@...r.kernel.org
>Cc: Kirsher, Jeffrey T; davem@...emloft.net; Dave, Tushar N;
>gospo@...hat.com; sassmann@...hat.com; jbeulich@...e.com
>Subject: Re: [net-next 02/11] e1000: Adding e1000_dump function
>
>On Tuesday 07 of February 2012 04:33EN, Jeff Kirsher wrote:
>> +		if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
>> +			print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
>> +					16, 1, phys_to_virt(buffer_info->dma),
>> +					buffer_info->length, true);
>
>This might cause problems in Xen environment, we encountered a crash in
>e1000e where phys_to_virt() is used the same way. I'm not familiar with
>the details but this is what Jan Beulich wrote about it:

How did you fix the problem in e1000e then? I don't see bus_to_virt used in any of our Ethernet drivers.
Also when running in Xen which arch are you running on?

-Tushar
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