Re: kernel 2.2.6
It is because on i386 machines the processor boots in real
mode, which is limited to the (in)famous 640Kb. The kernel
can be copied starting at address 0x10000, which takes
the available space down to 576Kb, then I think there must
be 64Kb used at the other end, hence the 512Kb
as a pose to 640Kb.
The zImage has to fit into this in its compressed form,
with some space being reserved for decompression when the
processor is in protected mode.
The bzImage copies the kernel setup into conventional
memory, but puts anything left over into higher. It then
uses the bios to copy over 64Kb chunks when needed, so
it doesn't run out of memory. The theoretical maximum size
for a bzImage is 2Gb, although in pracice it is limited by
the amount of memory.
Peter Allen
Shao Zhang wrote:
>
> Yes! But could anyone explaing to me why it is must be less than 512kb??
>
> Thanks
>
> Alec Smith wrote:
>
> > System has to be 512kb if I recall.
> >
> > make bzImage modules modules_install install
> >
> > is the command I use to build a kernel and it works without any problems.
> > Just did it with 2.2.6 on 2 machines yesterday.
> >
> > On Sat, 24 Apr 1999, Anonymous Coward wrote:
> >
> > > i'm a new debian user, but fairly experienced linux user. i just got
> > > slink (debian 2.1) in the mail so installed it. i downloaded kernel
> > > 2.2.6 to upgrade the first time it said a86 command not found so i
> > > searched mailing list archives and found out i needed the bin86 package
> > > so then that worked. now i try to compile and i get this message at the
> > > end after everythings all done:
> > >
> > > Root device is (3,5)
> > > Boot sector is 512 bytes
> > > Setup is 1286 bytes
> > > System is 526 kB
> > > System is too big. try using bzImage or modules.
> > >
> > >
> > > bzImage does not work and my kernel is in no way bloated. i only
> > > included standard stuff and it was practically the same as i had 2.0.36
> > > except for joystick support. what can i do?
> > >
> > >
> > > --
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> > >
> > >
> >
> > --
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>
> --
> ____________________________________________________________________________
> Shao Zhang - Running Debian 2.1 ___ _ _____
> Department of Communications / __| |_ __ _ ___ |_ / |_ __ _ _ _ __ _
> University of New South Wales \__ \ ' \/ _` / _ \ / /| ' \/ _` | ' \/ _` |
> Sydney, Australia |___/_||_\__,_\___/ /___|_||_\__,_|_||_\__, |
> Email: shao@cia.edu.au |___/
> _____________________________________________________________________________
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