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Re: [Xen-devel] Problem Reading from XenStore in DomU

Dagaen Golomb
On May 16, 2016 09:13, "Jonathan Creekmore" <jonathan.creekmore@xxxxxxxxx> wrote:
> Dagaen Golomb writes:
> > It does, being the custom kernel on version 4.1.0. But Dom0 uses this same
> > exact kernel and reads/writes just fine! The only solution if this is
> > indeed the problem appears to be changing the kernel source we build on or
> > some hacky method such as symlinking /proc/.. to /dev/.., there has to be
> > an elegant real solution to this...
> When I was chasing down a similar problem back in August, I discovered
> that Dom0 accesses XenStore through a unix domain socket and not through
> the kernel interface, so hitting it through xenstore-ls always seemed to
> work. That is why Dom0 reads/writes to XenStore ok with the same kernel
> that fails for your DomU. When I moved XenStore to a stubdomain, I /did/
> see the problem in Dom0 with new enough kernels, which is why the
> XenStore access library was changed to prefer the dev device instead of
> the proc file.

Great, I'll try out the XENSTORED_PATH variable when I get the chance and see if it resolves the issue.

Dagaen Golomb

Dagaen Golomb

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