On Fri, Dec 10, 2010 at 02:06, Prasad Joshi <prasadjoshi124@xxxxxxxxx> wrote:
> After trying most of the block devices to boot the kernel under QEMU,
> I added few printks around the code that does the mounting.
>
> The function mount_root() in file init/do_mounts.c, mounts the root
> file system. Using following code
>
> printk("\n\nmajor=%d minor=%d\n\n", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
> create_dev("/dev/root", ROOT_DEV);
> mount_block_root("/dev/root", root_mountflags);
>
> Question 1: Why is it creating a new device file with name /dev/root
> and mounting the /dev/root? I am specifying my root device to be
> /dev/hda1 as a boot parameter.
I think it's like unwritten rule...however, if you check /proc/mounts
in working Linux boxes, it will surely shows /dev/root.
OK, about the problem? Let's see....have you check your kernel config
and confirm that these two options are enabled?
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
In short, it's a way to make "old" userspace tools understand the new
way of Linux kernel represents device structures....Kindly try it and
tell us if it does fix the problem..
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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