Re: sparc hardware added to boot-floppies Installation Manual
> Steve Dunham wrote:
> > Jakub - I'm CCing you to get an answer to a question about tilo near
> > the end of this message.
> > Eric Delaunay <email@example.com> writes:
> > [...]
> > >  limit your kernel size to no greater than 1.5MB uncompressed.
> > > I was not able to load an initial ramdisk using a 1.6MB kernel because it
> > > is destroyed by kernel memory allocations at starting time (due to the
> > > method silo is using to load initrd in memory).
> > Does this happen with tilo too? The only limits I see in the source
> > code are:
> > "rootlen + sun4c_size + 0x4000 + 0x10000 < 0x330000"
> > "rootlen + sun4u_size + 0x4000 + 0x10000 < 0x330000"
> > And a max size for the final file of 0x400000.
> > Ultra kernels are typically >2MB. I doubt I can get them under 1.5MB.
> Don't know about tilo. I didn't try it yet.
> Hmm, I don't remember all the details, but one message was displayed at boot
> time, telling the kernel was too big. Something like that:
> "initrd overwritten... - disabling it"
> Silo is leaving 3MB of memory for the kernel itself, then loads the initrd
> just beyond this limit. However, when the kernel starts running, it allocates
> a lot of memory, overwritting my initrd.
The limit is 2.5MB for kernel itself on sparc32 and 3.5MB for kernel itself
on sparc64. The initial ramdisk should be allocated if possible from the top
of the hosts memory, so it should not collide.
> BTW, Jakub, is there a way to change this limit ?
> What is the maximum size an initial ramdisk could be (mine is 2.6MB, 955KB
> gziped, actually) ?
I'm running a 4.1MB/1.9MB gzipped initial ramdisk and it works just fine...
Jakub Jelinek | firstname.lastname@example.org | http://sunsite.mff.cuni.cz
Administrator of SunSITE Czech Republic, MFF, Charles University
UltraLinux | http://ultra.linux.cz/ | http://ultra.penguin.cz/
Linux version 2.2.1 on a sparc64 machine (3958.37 BogoMips)