RE: [Bug-grub] Can't configure grub to use less memory

[Darren Gamble]

Good day,

Thanks for your reply.

I had incorrectly given the syntax that I had used, sorry.  I _did_ use
append="mem=800M".

Also, grub doesn't appear to be appending anything to the line (although I
have read both documentation and bug reports on that) EVEN if I use the
append and/or uppermem options.  The splash screen always reports 1GB of
RAM, BTW.  Log has:


Jan 23 09:37:26 ks kernel: Kernel command line: ro root=/dev/rd/c0d0p1


If this helps, here is the "original" grub.conf.  Things I have tried
include:

- append="mem=800M" to the global options, boot options, and both.
- uppermem=819200 to the global options, boot options, and both.
- Both append and uppermem together.
- Adding "mem=800M" to the end of the command manually.

Also, here is what the log shows LILO as using (which is working)...


Jan 23 09:47:57 ks kernel: Kernel command line: auto BOOT_IMAGE=linux ro
root=3001 BOOT_FILE=/boot/vmlinuz-2.4.9-13enterprise mem=800M





default=0
timeout=10
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
password --md5 xxxxxx
title Red Hat Linux (2.4.9-13enterprise)
        root (hd0,0)
        kernel /boot/vmlinuz-2.4.9-13enterprise ro root=/dev/rd/c0d0p1
        initrd /boot/initrd-2.4.9-13enterprise.img
title Red Hat Linux-smp (2.4.9-13smp)
        root (hd0,0)
        kernel /boot/vmlinuz-2.4.9-13smp ro root=/dev/rd/c0d0p1
        initrd /boot/initrd-2.4.9-13smp.img
title Red Hat Linux-up (2.4.9-13)
        root (hd0,0)
        kernel /boot/vmlinuz-2.4.9-13 ro root=/dev/rd/c0d0p1
        initrd /boot/initrd-2.4.9-13.img


============================
Darren Gamble
Planner, Regional Services
Shaw Cablesystems GP
630 - 3rd Avenue SW
Calgary, Alberta, Canada
T2P 4L4
(403) 781-4948


-----Original Message-----
From: Jason Thomas [mailto:address@hidden
Sent: Wednesday, January 23, 2002 3:42 PM
To: Darren Gamble
Subject: Re: [Bug-grub] Can't configure grub to use less memory


On Wed, Jan 23, 2002 at 03:19:58PM -0700, Darren Gamble wrote:
>
http://www.redhat.com/docs/manuals/linux/RHL-7.2-Manual/install-guide/s1-tro
> uble-after.html
> 
> ... using the statement
> 
> append="800M" in the grub configuration file.

this is wrong, it should be:

append="mem=800M"

but for grub its different, that syntax is for lilo.

in grub.conf

kernel /vmlinuz root=/dev/hda1 ro mem=800M


also grub appends a mem= line automatically, so you may need to rebuild
the package with the configure option to disable this.