Hello,
I tried to understand the correlarion between initrd in grub.conf and the call to initrd_load() in the kernel (under init subtree). My question is : when we do not use initrd in grub (meaning there is no entry for initrd in grub.conf), does the kernel still calls load_initrd()? Or does it sets somehow the mount_initrd variable to false ? if so - how ?
Grepping the kernel for no_initrd() shows that do_mounts_initrd.c is the only
"C" file where this method definition appears.
Does it have to do with the _setup call in this file : __setup("noinitrd", no_initrd) ?
I did not see initrd it in the kernel command line: When I run cat /proc/cmdline to see the kernel command line, I do not see any mention of initrd (thoughin my grub.conf I DO USE initrd ). What I see is: ro root=/dev/hda3 hdb=none hdc=none hdd=none
Trying to understand the code raise some confusion (as is depicted below) So I hope maybe one of the Mulixes knows something about it.
I had looked at 2.6.7 kernel. what I see (under init subtree):
There is a variable named "mount_initrd" which is initialized to true (1) in do_mounts_initrd.c
The initrd_load() method (also in do_mounts_initrd.c) checks this variable and
if it is true it performs the load initrd process (creates /dev/ram0 and loads
the initrd data into it by calling rd_load_image() ).
There is a method named no_initrd() in this file which sets mount_initrd to 0.
there is also a call to __setup("noinitrd", no_initrd);
(This macro calls __setup_param() in init.h ; it says there that it is OBSOLOETE
and send us to moduleparam.h.)
Regards, Dan
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