Re: [Xen-devel] [PATCH] libxl: add libxl__is_driver_domain function

[Oleksandr Grytsov <al1img@xxxxxxxxx>]

On Mon, Feb 26, 2018 at 12:14 PM Oleksandr Grytsov <al1img@xxxxxxxxx> wrote:
>
> On Fri, Feb 23, 2018 at 7:44 PM, Wei Liu <wei.liu2@xxxxxxxxxx> 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@xxxxxxxxxx> 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@xxxxxxxxxx> wrote:
>> > > >
>> > > > > On Thu, Dec 14, 2017 at 04:14:12PM +0200, Oleksandr Grytsov wrote:
>> > > > > > From: Oleksandr Grytsov <oleksandr_grytsov@xxxxxxxx>
>> > > > > >
>> > > > > > 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.


Let me renew this topic.

xl devd cleans up the state entries only for specific devices: VBD, VIF, QDISK.
I wonder, shall xl devd perform cleaning for all other backends in
driver domain as well?


-- 
Best Regards,
Oleksandr Grytsov.

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