linux-kernel - RE: [PATCHv2] tools: hv: hv_set_ifconfig.sh double check before setting ip

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Message-ID: <DM5PR21MB04767A3716FAAF5812F59C8CA0300@DM5PR21MB0476.namprd21.prod.outlook.com>
Date:   Fri, 8 Dec 2017 19:04:26 +0000
From:   KY Srinivasan <kys@...rosoft.com>
To:     Olaf Hering <olaf@...fle.de>, Eduardo Otubo <otubo@...hat.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "Stephen Hemminger" <sthemmin@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "mgamal@...hat.com" <mgamal@...hat.com>,
        "cavery@...hat.com" <cavery@...hat.com>
Subject: RE: [PATCHv2] tools: hv: hv_set_ifconfig.sh double check before
 setting ip



> -----Original Message-----
> From: Olaf Hering [mailto:olaf@...fle.de]
> Sent: Friday, December 8, 2017 3:34 AM
> To: Eduardo Otubo <otubo@...hat.com>
> Cc: linux-kernel@...r.kernel.org; devel@...uxdriverproject.org; Stephen
> Hemminger <sthemmin@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>;
> vkuznets@...hat.com; mgamal@...hat.com; cavery@...hat.com
> Subject: Re: [PATCHv2] tools: hv: hv_set_ifconfig.sh double check before
> setting ip
> 
> On Fri, Dec 08, Eduardo Otubo wrote:
> 
> >  tools/hv/hv_set_ifconfig.sh | 45
> +++++++++++++++++++++++++++++++++++++++++++--
> >  1 file changed, 43 insertions(+), 2 deletions(-)
> 
> > +        # let's wait for 3 minutes
> 
> Was this codepath runtime tested?
> 
> Last time this came up, the conclusion was that Windows terminates the
> "KVP connection" after 60 seconds. After that, the VM must be rebooted
> because the kernel does not deal with the long-running script. It is
> also not clear what the kernel is supposed to do: either silently report
> success and hope the scripts reports success one day, or report error
> independent from what the script actually returns. New KVP requests
> would need to be queued either way.

Agreed; 180 seconds is more than what the host is willing to wait.

K. Y
> 
> 
> Olaf