Re: [Xen-devel] Running xenstored in Linux stubdom

[Juergen Gross <jgross@xxxxxxxx>]

On 04.09.19 17:45, Daniel Smith wrote:
> Greetings,
>
> I am attempting to see if I can get xenstored to run within a Linux
> stubdom for a variety of reasons. The way I have it constructed at
> this point is that embedded within the initramfs of dom0 is the linux
> stubdom image along with the init-xenstore-domain helper. The init
> script within the initramfs does basic Linux start setup, launches
> udev and then attempts to start the stubdom using the helper binary.
> The helper binary hangs and using strace shows the last calls before
> hanging is,
>
> write(3, "/tool/xenstored/domid\0:, 22) = 22
> write(3, "1", 1)                                      = 1
> read(3,
>
> For the stubdom itself, its init script does the basic Linux start
> setup and then executes xenstored in foreground. I have tested the
> stubdom as a regular guest passing the --no-domain-init flag and I see
> no issues with the domain starting and launching xenstored.
>
> For a point of reference, I have been able to successfully use the
> minios stubdom in place of the Linux stubdom. I have been reviewing
> the minios version to see what I might be missing in the LInux version
> to no avail. Perhaps others may have insight on what the issue may be.
The stubdom gets an event channel to use for dom0 xenbstore connection
via commandline parameter ("--event <event-nr>"). This needs to be used
in the stubdom for setting up the communication path.


Juergen

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