Re: [Xen-devel] [linux-4.1 test] 63030: regressions - FAIL

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Oct 21, 2015 at 10:04:14AM +0100, Ian Campbell wrote:
> On Tue, 2015-10-20 at 16:24 +0100, Wei Liu wrote:
> > But this is only code inspection,  so I'm not very confident whether
> > everything does what it says it does.
> 
> Right,. I think this one probably needs someone to setup a system in a
> similar configuration and play with it.
> 

Is there an easy way to do that? Say, give me some runes so that I can
lock a machine in Cambridge instance, run the failing test case.

> xen-netfront.c calls netdev_notify_peers (née netif_notify_peers). I seem
> to vaguely recall that setting some sysctl (arp_notify?) can be required to
> allow that to actually do anything but I think that has been fixed i.e.
> NETDEV_NOTIFY_PEERS is unconditional in inetdev_event() and only
> NETDEV_CHANGEADDR is gated.
> 

Found your patch posted in 2011.

https://patchwork.ozlabs.org/patch/82813/

I think you're right and the said behaviour exists in Wheezy's 3.2
kernel.

Wei.

> Ian.

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