RE: [Xen-devel] [PATCH] Fox for pcnet device model data corruption

["Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx>]

Hi Dan,
I also tried the i386 RHEL3U5 vmx guest on top of FC4 x86_64 dom0 host,
and I am not seeing any issues with scp from dom0 to vmx guest. Ther
guest kernel now is 2.4 and the data rate I am getting is 3.0MBps now.
   I am trying it on SMP system, but the dom0 is still UP. How about
your dom0?

Thanks & Regards,
Nitin
------------------------------------------------------------------------
-----------
Open Source Technology Center, Intel Corp

>-----Original Message-----
>From: Daniel Stekloff [mailto:dsteklof@xxxxxxxxxx]
>Sent: Monday, February 27, 2006 8:41 AM
>To: Kamble, Nitin A
>Cc: Li, Xin B; Ian Pratt; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: RE: [Xen-devel] [PATCH] Fox for pcnet device model data
corruption
>
>
>Hi Nitin,
>
>I set up a private bridge on dom0 and then have the VMX domain use that
>bridge. I use the private bridge to limit the error, so no copying off
>system. I'm using a 2GB file for the test. I'm running on 32 and 64bit
>SMP systems. I'm using a rhel3u5 Linux guest image, which is a 2.4
>kernel. If I add any debugging in pcnet_receive(), it slows it down
>enough for the transfer to work.
>
>What environment are you testing in? What is your test case? Are you
not
>seeing the error anymore?
>
>Is anyone else still seeing the issue like I am?
>
>Since I've applied your patch, it fails quicker now - a few mbs into
the
>transfer rather than hundreds of mbs before.
>
>I will try a linux 2.6 guest today.
>
>Thanks,
>
>Dan
>
>On Mon, 2006-02-27 at 08:19 -0800, Kamble, Nitin A wrote:
>> Hi Dan,
>>   If you are scping from different host, then it is possible that you
>> are seeing the dom0 network issue in the vmx guest. Can you try
scping
>> the file from dom0 to vmx guest?
>>
>> Thanks & Regards,
>> Nitin
>>
------------------------------------------------------------------------
>> -----------
>> Open Source Technology Center, Intel Corp
>>
>> >-----Original Message-----
>> >From: Daniel Stekloff [mailto:dsteklof@xxxxxxxxxx]
>> >Sent: Saturday, February 25, 2006 7:46 AM
>> >To: Li, Xin B
>> >Cc: Kamble, Nitin A; Ian Pratt; xen-devel@xxxxxxxxxxxxxxxxxxx
>> >Subject: RE: [Xen-devel] [PATCH] Fox for pcnet device model data
>> corruption
>> >
>> >On Sat, 2006-02-25 at 14:51 +0800, Li, Xin B wrote:
>> >> >> Hi Ian,
>> >> >>
>> >> >>    The attached patch fixes pcnet data corruption for VMX
guests
>> as
>> >> >> reported by you.
>> >> >
>> >> >
>> >> >Hi Nitin,
>> >> >
>> >> >This doesn't fix the problem for me. If I try to transfer, with
scp,
>> a
>> >> >2gb file to DomU from Dom0, the transfer is disconnected with the
>> >> >following error:
>> >> >
>> >> >Received disconnect from 192.168.1.3: 2: Corrupted MAC on input.
>> >>
>> >> This fix is to VMX domain only.
>> >> -Xin
>> >
>> >
>> >Yeah.. sorry if I wasn't specific in my comment, referring to DomU
and
>> >not VMX domain. But the comment remains.
>> >
>> >This patch does not completely fix the race in qemu-dm for VMX
domains.
>> >I tested this patch on my SMP system and the corruption still
happens.
>> I
>> >couldn't successfully transfer a 2 gb file from Dom0 to a VMX
domain.
>> >The VMX domain is still seeing corruption.
>> >
>> >Thanks,
>> >
>> >Dan

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