07-11-2011
You can view messages from the kernel using dmesg. These may or may not contain information about initrd. But basically there's not much happening: the kernel reads the file provided at the command line, unpacks it, and runs the init binary contained within.
The only way I can think of to get more information would be to attach to a kernel debugger interface, if present.
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LEARN ABOUT DEBIAN
mkdumprd
MKDUMPRD(8) User Manuals MKDUMPRD(8)
NAME
mkdumprd - (Re)build the initramfs for kdump
SYNOPSIS
mkdumprd [-h] [-q] [-f] [-k kernelver] [-i opts]
DESCRIPTION
mkdumprd (re-)builds the kdump initrd. For kdump, a special initrd is used because
o the kdump initrd should include network modules and network configuration (and therefore is larger as the normal initrd used for
booting),
o the kdump initrd should use no splash screen,
o the kdump initrd includes kdumptool(8) and all required libraries.
This script calls mkinitrd(8) with all required parameters. If the initrd already exists, it checks first if the configuration file or the
kernel are newer, and only rebuilds the initrd if necessary.
OPTIONS
All option parsing is done via the getopt(3) function, and therefore follows all standard command line parsing rules.
-h | --help
Shows help output and exits.
-k kernelversion
Specifies the kernel version. If no version is specified and also no kernel or initrd are specified, then mkdumprd uses kdumptool(8) to
find out the correct kernel and initrd.
-K kernel
Specifies the kernel binary. If you specify that option, also specify -I.
-I initrd
Specifies the resulting initrd. If you specify that option, also specify -K.
-q
Be quiet. Don't output status messages. Used to call mkdumprd(8) from /etc/init.d/kdump init script.
-i parameters
Append the specified parameters to mkinitrd(8) call.
FILES
/etc/sysconfig/kdump
Kdump configuration. See kdump(5).
BUGS
Please report bugs and enhancement requests at https://bugzilla.novell.com.
COPYING
Copyright (c) 2008 Bernhard Walle <bwalle@suse.de>. Free use of this software is granted under the terms of the GNU General Public License
(GPL), version 2 or later.
SEE ALSO
kdumptool(8), mkinitrd(8), http://en.opensuse.org/Kdump
kdump 0.8.1 07/05/2010 MKDUMPRD(8)