pkgsrc/sysutils/xenkernel42/DESCR
gdt 71c33cddb9 Explain xen version differences.
There are 5 versions of xen in pkgsrc, which is confusing.  Explain in
DESCR which version is in which package (xenkernel3 contains 3.1), and
which versions support PCI passthrough (only 3.1).  Explain which
versions support non-PAE (3.1) and PAE (3.3, 4.1, 4.2), because the
HOWTO is out of date and it's easy to end up with a non-working system
on a 3.1 to 3.3 update.  Cuation that 2.0 is beyond crufty.

This is a DESCR-only change (with PKGREVISION++ of course).

(ok during freeze agc@)
2013-06-19 14:03:41 +00:00

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Xen is a virtual machine monitor which supports running multiple
guests operating systems on a single machine. Guest OSes (also
called "domains") require a modified kernel which supports Xen
hypercalls in replacement to access to the physical hardware. At
boot, the xen kernel is loaded along with the guest kernel for the
first domain (called domain0). domain0 has privileges to access
the physical hardware (PCI and ISA devices), administrate other
domains and provide virtual devices (disks and network) to other
domains.
This package contains the 4.2 Xen4 kernel itself. PCI passthrough is
not supported. PAE is mandatory; on i386 one must use XEN3PAE_DOM[0U].