doc, xen: Mention 'earlyprintk=xen' in the documentation.
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Mon, 25 Feb 2013 20:54:08 +0000 (15:54 -0500)
committerH. Peter Anvin <hpa@linux.intel.com>
Mon, 25 Feb 2013 21:41:18 +0000 (13:41 -0800)
commit2482a92e7d17187301d7313cfe5021b13393a0b4
treeff6af9e9cb48da1e898e0916c9ebf5f74b57bdcb
parent565d956a7e191e95d81f515196951715f2616e6b
doc, xen: Mention 'earlyprintk=xen' in the documentation.

The earlyprintk for Xen PV guests utilizes a simple hypercall
(console_io) to provide output to Xen emergency console.

Note that the Xen hypervisor should be booted with 'loglevel=all'
to output said information.

Reported-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1361825650-14031-2-git-send-email-konrad.wilk@oracle.com
Cc: <stable@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Documentation/kernel-parameters.txt