netdev - Re: [Xen-devel] xen-netfront crash when detaching network while some network activity

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Message-ID: <555F5888.4020303@citrix.com>
Date:	Fri, 22 May 2015 17:25:44 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	Marek Marczykowski-Górecki 
	<marmarek@...isiblethingslab.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"David Vrabel" <david.vrabel@...rix.com>
CC:	<netdev@...r.kernel.org>, xen-devel <xen-devel@...ts.xen.org>
Subject: Re: [Xen-devel] xen-netfront crash when detaching network while some
 network activity

On 22/05/15 12:49, Marek Marczykowski-Górecki wrote:
> Hi all,
> 
> I'm experiencing xen-netfront crash when doing xl network-detach while
> some network activity is going on at the same time. It happens only when
> domU has more than one vcpu. Not sure if this matters, but the backend
> is in another domU (not dom0). I'm using Xen 4.2.2. It happens on kernel
> 3.9.4 and 4.1-rc1 as well.
> 
> Steps to reproduce:
> 1. Start the domU with some network interface
> 2. Call there 'ping -f some-IP'
> 3. Call 'xl network-detach NAME 0'

I tried this about 10 times without a crash.  How reproducible is it?

I used a 4.1-rc4 frontend and a 4.0 backend.

David
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