netdev - Re: [ovs-dev] [GIT net-next] Open vSwitch

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Message-ID: <52D4857C.7020902@citrix.com>
Date:	Tue, 14 Jan 2014 00:31:56 +0000
From:	Zoltan Kiss <zoltan.kiss@...rix.com>
To:	Jesse Gross <jesse@...ira.com>
CC:	David Miller <davem@...emloft.net>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [ovs-dev] [GIT net-next] Open vSwitch

On 13/01/14 18:04, Zoltan Kiss wrote:
> On 08/01/14 15:10, Jesse Gross wrote:
>> On Wed, Jan 8, 2014 at 9:49 AM, Zoltan Kiss <zoltan.kiss@...rix.com> 
>> wrote:
>>> Hi,
>>>
>>> I've tried the latest net-next on a Xenserver install with 1.9.3 
>>> userspace,
>>> and it seems this patch series broke it (at least after reverting that
>>> locally it works now). I haven't went too far yet checking what's the
>>> problem, but it seems the xenbrX device doesn't really receive too 
>>> much of
>>> the traffic coming through the NIC. Is it expected?
>>
>> What do you mean by doesn't receive too much traffic? What does it get?
>>
>
> Sorry for the vague error description, now I had more time to look 
> into this. I think the problem boils down to this:
>
> Jan 13 17:55:07 localhost ovs-vswitchd: 
> 07890|netlink_socket|DBG|nl_sock_recv__ (Success): nl(len:274, 
> type=29(ovs_packet), flags=0, seq=0, pid=0,genl(cmd=1,version=1)
> Jan 13 17:55:07 localhost ovs-vswitchd: 07891|netlink|DBG|attributes 
> followed by garbage
> Jan 13 17:55:07 localhost ovs-vswitchd: 07892|dpif|WARN|system@...br0: 
> recv failed (Invalid argument)
>
> That's just keep repeating. I'm keep looking.

Now I reverted these top 3 commits:

ovs: make functions local
openvswitch: Compute checksum in skb_gso_segment() if needed
openvswitch: Use skb_zerocopy() for upcall

And it works. I guess the last one causing the problem. Might be an 
important factor, I'm using 32 bit Dom0.

Zoli
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