On Fri, Jan 16, 2009 at 11:12:56PM +0800, loody wrote:
> >> 2. My kernel seems ready so far because it can successfully keep
> >> running before run_init_process("/sbin/init"), then it tells me "No
> >> init found. Try passing init= option to kernel."
> >> I know the problem comes from I didn't tell the kernel where the
> >> root file system is.
> >
> > Yes.
> >
> >> I have googled the "root file system", but they only tell me the
> >> purpose of it and minimum elements it should have.
> >> But I cannot find any information tell me how to let the kernel
> >> know where it is.
> >
> > On the command line, with "root=/dev/sda3" or some such device node.
> Hi:
> how kernel where the root file system is only by passing him just a string?
The kernel looks up the name in the list of block devices, and
determines the major:minor number of the device, and then opens that.
Or you can pass in the major:minor number of the device if you don't
want to use the name.
> What I mean is, I put my decompressed kernel in dram and let it run.
>
> And at the end of init_post, it will find out where root file system
> is by passing him
> "root=/dev/sda3"?
Yes. As long as you do have a root filesystem on /dev/sda3, which, for
some reason, I doubt you do :)
You should pass in the block name for where your root filesystem is.
good luck,
greg k-h
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