Re: [PATCH] libxl: add libxl__is_driver_domain function

From: Oleksandr Grytsov <al1img@gmail.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Oleksandr Grytsov <oleksandr_grytsov@epam.com>
Subject: Re: [PATCH] libxl: add libxl__is_driver_domain function
Date: Mon, 26 Feb 2018 12:14:55 +0200	[thread overview]
Message-ID: <CACvf2oXkN6xfNmveFT2hQCPdicrdTe1pedLmCXsOVsx8OLBW-A@mail.gmail.com> (raw)
In-Reply-To: <20180223174448.3vmc7a74vr6b42lx@citrix.com>

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On Fri, Feb 23, 2018 at 7:44 PM, Wei Liu <wei.liu2@citrix.com> wrote:

> On Tue, Feb 13, 2018 at 03:32:04PM +0200, Oleksandr Grytsov wrote:
> > On Tue, Feb 13, 2018 at 2:06 PM, Wei Liu <wei.liu2@citrix.com> wrote:
> >
> > > On Tue, Feb 06, 2018 at 03:08:45PM +0200, Oleksandr Grytsov wrote:
> > > > On Tue, Feb 6, 2018 at 2:36 PM, Wei Liu <wei.liu2@citrix.com> wrote:
> > > >
> > > > > On Thu, Dec 14, 2017 at 04:14:12PM +0200, Oleksandr Grytsov wrote:
> > > > > > From: Oleksandr Grytsov <oleksandr_grytsov@epam.com>
> > > > > >
> > > > > > We have following arm-based setup:
> > > > > >
> > > > > > - Dom0 with xen and xen tools;
> > > > > > - Dom1 with device backends (but it is not the driver domain);
> > > > >
> > > > > What is your definition of a "driver domain"? What does it do in
> this
> > > > > case?
> > > > >
> > > > > I seem to have seen people use this term in different contexts to
> mean
> > > > > slightly different things. I need to figure out what you actually
> mean
> > > > > first.
> > > > >
> > > > >
> > > > I see in the libxl/xl sources that closing PV devices is done
> differently
> > > > in case backends are in Dom0 and are in other domain. It is called as
> > > > driver domain in the sources. So, I don't have clear understanding
> > > > what does it mean. In our setup backends are in Dom1 and xl is in
> Dom0.
> > > > And I see that xl dosn't close PV device on domain reboot or
> shutdown.
> > >
> > > Do you run xl devd in your backend domain?
> > >
> > > Wei.
> > >
> >
> > No I don't
>
> Can you try that? I think xl devd should clean up the stale entries --
> that's how we envisage driver domains to be used.
>
> Wei.
>

We will check this. Thanks.

-- 
Best Regards,
Oleksandr Grytsov.

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