Re: how to increase commandline size (patch + changelog)

[Jeff Chua]

On Mon, 9 Oct 2006, Hollis Blanchard wrote:

> > Shall I use '#ifdef __linux__' to include <asm/param.h> only on linux, and
> > '#define COMMAND_LINE_SIZE 255' for non-linux system?
5B> Well, does this number change often? If not, let's just copy it.
> If so, then we're screwed anyways because asm/param.h would only match
> the installed kernel's limit, so may not work for other kernel versions.

You're right. asm/param.h determines the limit. We've read this from here 
for linux.

The idea is that there are users out there who wants to pass quite a few 
parameters during boot, and loadlin currently handles this. I'm passing 
network address, netmask, broadcast, hostname, modules_to_load and boot 
the system up using ramdisk. This allow every system to be unique and yet 
able to boot from the same CDROM/image.

So, another approach is to use "configure --CommandLineSize=1024" to 
specify the size, but I thought reading from asm/param.h would be easier.

Setting the current limit to 255 essentially means grub sets it's own 
limit, and even the kernel supports 1024, grub doesn't.


Jeff.