Re: /dev/ksyms under Xen-4.7

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Sep 29, 2016 at 12:35:01AM -0400, Brian Marcotte wrote:
> I upgraded some of my systems to Xen 4.7.0 and found that in NetBSD domUs,
> /dev/ksyms no longer works:
> 
>     # hexdump -C /dev/ksyms
>     hexdump: /dev/ksyms: Device not configured
>     hexdump: /dev/ksyms: Bad file descriptor
> 
> This prevents some utilities like fstat or lsof from working.
> 
> The NetBSD domUs are 6.1.5, 7.0, or current (from NetBSD-daily).
> The dom0s are Linux 4.1 or 4.7.
> 
> The kernel output, below, doesn't give me any indication why this is.

I fear this is a Xen problem. It looks like Xen 4.7 fails to load the
right section from the kernel's ELF image.
Earlier Xen version did get it right, so we'll have to find what
changed in 4.7 sources ...


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--