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Chapter 8

Build, Boot and Debug options

This chapter describes the build- and boot-time options which may be used to tailor

your Xen system.

8.1 Xen Build Options

Xen provides a number of build-time options which should be set as environment

variables or passed on make’s command-line.

verbose=y Enable debugging messages when Xen detects an unexpected condition.

Also enables console output from all domains.

debug=y Enable debug assertions. Implies verbose=y. (Primarily useful for tracing

bugs in Xen).

debugger=y Enable the in-Xen debugger. This can be used to debug Xen, guest OSes,

and applications.

perfc=y Enable performance counters for signiﬁcant events within Xen. The counts

can be reset or displayed on Xen’s console via console control keys.

trace=y Enable per-cpu trace buffers which log a range of events within Xen for col-

lection by control software.

8.2 Xen Boot Options

These options are used to conﬁgure Xen’s behaviour at runtime. They should be ap-

pended to Xen’s command line, either manually or by editing grub.conf.

noreboot Don’t reboot the machine automatically on errors. This is useful to catch

debug output if you aren’t catching console messages via the serial line.

nosmp Disable SMP support. This option is implied by ‘ignorebiostables’.

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Belkin XM Commander Bedienungsanleitung Seite 43