[syslinux] Syslinux Mem= greater than 4096M

[Kevin Sullivan]

Hi Shao,

I have several boot options, but here is one example:

LABEL less
    MENU LABEL Up to 64 GB System RAM
    KERNEL /boot/vmlinuz-3.1.10-b1
    APPEND pci=nommconf vga=773 mem=256M initrd=/boot/initrd-3.1.10-b1.img

This boots a Linux kernel that can only "see" 256 MB.  If I set mem=4097 or
greater, I get the error message.

On Fri, Feb 3, 2012 at 7:13 PM, Shao Miller <Shao.Miller at yrdsb.edu.on.ca>wrote:

> On 2/3/2012 19:34, Kevin Sullivan wrote:
>
>> Hi Everyone. I have a question that I have researched, but cannot find an
>> answer. I was wondering if any of the syslinux guru's might have some
>> suggestions for me. We use syslinux (4.04) to boot a specialized USB
>> distribution of Linux that requires the mem= flag to be added to the
>> syslinux.cfg file. The mem= flag is a requirement as this is a custom
>> kernel distribution that uses kernel modules in a highly specialized
>> manner. I can set mem= all the way up to 4096M, but at 4097 and greater, I
>> get the error message of: Not enough memory to load specified image. We
>> have a boot CD port of this same distribution using the legacy (grub 1)
>> boot, and it accepts mem= to levels tested as high as 8192M. Now,
>> obviously, I'm likely hitting a 32 bit syslinux limitation, but we love
>> using syslinux on our USB distribution as it boots on every system that we
>> test on, whereas grub has proven to be problematic. So, can anyone suggest
>> a method for us to pass a mem= 4097M or greater? Any suggestions would be
>> greatly appreciated. Or, on another note, would grub2 be a viable
>> bootloader for USB storage?
>>
>
> I could be mistaken, but I don't recall 'mem=' being a Syslinux anything.
>  What does the Syslinux LABEL paragraph have in it, if you please?  - Shao
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