Initrd..

[gnu@vsnl.net (Ramakrishnan M)]

Hi,

I am trying to make a kernel with initrd support (just to understand how to make
an kernel with initrd support and how initrd works with it).

I built the kernel with initrd support, and made an initrd image (using the excellent
initrd-tools package) and using the modules of the same above kernel.

While booting (I added the initrd boot parameter in the GRUB), I get the following 
message.

The initrd (after gzipping) has a size of around 1.1 MB. 

<from the kern.log>

[....]
Apr 21 23:02:18 alpha kernel: BIOS-provided physical RAM map:
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 0000000000100000 - 0000000007fd0000 (usable)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 0000000007fd0000 - 0000000007fdf000 (ACPI data)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 0000000007fdf000 - 0000000007fe0000 (ACPI NVS)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 0000000007fe0000 - 0000000008000000 (reserved)
Apr 21 23:02:18 alpha kernel:  BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)
Apr 21 23:02:18 alpha kernel: initrd extends beyond end of memory (0x07fbf6e3 > 0x07f70000)
Apr 21 23:02:18 alpha kernel: disabling initrd
Apr 21 23:02:18 alpha kernel: On node 0 totalpages: 32624
Apr 21 23:02:18 alpha kernel: zone(0): 4096 pages.
Apr 21 23:02:18 alpha kernel: zone(1): 28528 pages.
Apr 21 23:02:18 alpha kernel: zone(2): 0 pages.
Apr 21 23:02:18 alpha kernel: IBM machine detected. Enabling interrupts during APM calls.
Apr 21 23:02:18 alpha kernel: Kernel command line: mem=130496K root=/dev/hda2
Apr 21 23:02:18 alpha kernel: Initializing CPU#0
[...]

I am able to boot the machine and use it, only thing is that initrd never gets used.

My machine is an IBM thinkpad 600, with 300Mhz P2 and 128 MB Ram. The BIOS is an old one..

Any idea what is happening?

I am totally new to the initrd way and am a total neophyte in initrd way of things.
-- 
    Ramakrishnan M <rkrishnan@debian.org>


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