From: Jesse Gross <je...@nicira.com>
Date: Mon, 3 Sep 2012 17:57:39 -0700

> On Fri, Jul 20, 2012 at 3:26 PM, Jesse Gross <je...@nicira.com> wrote:
>> It's possible that packets that are sent on internal devices (from
>> the OVS perspective) have already traversed the local IP stack.
>> After they go through the internal device, they will again travel
>> through the IP stack which may get confused by the presence of
>> existing information in the skb. The problem can be observed
>> when switching between namespaces. This clears out that information
>> to avoid problems but deliberately leaves other metadata alone.
>> This is to provide maximum flexibility in chaining together OVS
>> and other Linux components.
>>
>> Signed-off-by: Jesse Gross <je...@nicira.com>
> 
> It was recently discovered that the bug that this patch fixes is
> causing problems in the real world.  Can you please queue this for
> stable in 3.4/3.5?  It's currently in Linus's tree as
> 7fe99e2d434eafeac0c57b279a77e5de39212636.
> 

What vendor is shipping openvswitch enabled and requires the fix to
be in -stable before they'll ship it to customers?

That goes into what is 'real world'
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