Messages in this thread |  | | From | Robert Kaiser <> | Subject | Re: Disk is cheap? | Date | Tue, 6 Feb 2001 15:49:30 +0100 |
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On Sam, 03 Feb 2001 you wrote: > > Usually most of the startup time is spent by the BIOS doing > > extensive self-test stuff and for firing up services (http, > > inetd, sendmail, ...) that many embedded systems have little use > > for. > > Actually, most of that time is spent running bash/sleep 1. Startup > scripts tend to be poorly designed.
Yes!
> > I have a 25MHz 386EX (~2.2 Bogomips) here that boots Linux out of ROM > > in roughly 30 seconds. Most of _that_ time however is spent decompressing > > the kernel. > > You might want to set up XIP and run kernel directly off the ROM... >
Hmm, that board has only 512KB ROM. I can fit a minimal Linux kernel and root-FS in that, but only if it's compressed. ROM, in my experience, is more expensive than RAM, so it often makes sense to save ROM space even at the expense of using a little more RAM.
But I'm curious: is there a simple procedure to set up a linux Kernel to execute from ROM ?
---------------------------------------------------------------- Robert Kaiser email: rkaiser@sysgo.de SYSGO RTS GmbH Am Pfaffenstein 14 phone: (49) 6136 9948-762 D-55270 Klein-Winternheim / Germany fax: (49) 6136 9948-10 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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