Re: [Xen-devel] [BUG] 16 vcpus + 2 vif bridge = issue ?

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Thu, 2015-09-24 at 03:16 +0300, Roman Shubovich wrote:
> hi
> 
> i have physical server with 40 cpu cores
> and i need to create a hvm domu with at least 16 vcpus and 2 network
> bridges
> when i start that domu i have some not understable issue - the second
> bridge has no traffic from network (works only first interface - first
> declared in config file). i can see traffic with tcpdum on dom0, but not
> on vif interface that has been created by domu startup script.
> 
> when i reduce number of vcpu to 15 or less then bridges works fine

Please post some logs:

 * dmesg of both host and guest
 * output of these commands in dom0 while the guest is running with 2 vifs
   configured (but only one working):
    * "brctl show"
    * "ifconfig -a"
 * The output of "ifconfig -a" within the guest in the same configuration.
 * The guest configuration file you are using.

Thanks.
Ian.

> 
> system:
> dom0 ubuntu 14.04.03 kernel 3.18.21
> domu ubuntu 14.04.03 kernel 3.18.21
> tried xen:
> xen 4.4
> xen 4.5
> xen 4.6
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> http://lists.xen.org/xen-devel

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