Messages in this thread | | | Date | Tue, 13 Mar 2007 00:12:20 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH] x86_64, i386: Add command line length to boot protocol |
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Hi!
> > > > +cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line, > > > > > > Why a long? It's unlikely that someone is going to have a command line > > > bigger than 0xffff. > > > > Well, I could imagine overflowing that. Describing your numa setup, > > excluding few bad bits of ram using memmap=exact, set up your boot > > over iscsi on cmdline.... these are likely to eat insane ammount of > > cmdline space. > > 65535 characters? Are you for real? > Stop and think about just how big that is. If you have to create > a boot command line that long, you have serious, serious issues.
Well, it is about the same size as my .config...
I agree we are unlikely to hit it any time soon... I could imagine some (ab)uses, like fixed_acpi_bios=<lots of hex digits>, but those are ugly. I could also imagine some uses where entire embedded machine is described at kernel commandline.
Yes, all those are ugly/unlikely. OTOH saving 2 bytes does not seem like that great goal. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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