Hi,
Thanks for the reply. I'm using the SMP version of the kernel
(2.4.27-2-686-smp), so should I be downloading the source for that instead of
the regular 2.4.27 kernel?
-Glen
--
Glen Yu, B.Eng | 416-739-4861 | [EMAIL PROTECTED]
--
-Original Message-
From: Matt Zagrabelny [mailto:[EMAIL PROTECTED]
Sent: Friday, March 24, 2006 1:58 PM
To: debian-user@lists.debian.org
Subject: Re: Memory trouble
On Fri, 2006-03-24 at 13:28 -0500, Yu,Glen [Ontario] wrote:
Hi everyone,
This is kind of long, so bear with me...
I have used Linux (FC, SuSE, and recently Debian 3.1) for many years in the
past, but have never actually done and modification/configuration of the
kernel, and would like some pointers/tips or maybe a useful link to a guide
which give good instructions as to how to configure the kernel (specifically
for Debian 3.1). I see a few tutorials when I google this topic, but none
are specific to Debian (example: they tell you to go to /usr/src/linux, but I
don't have that directory =| ).
What I'm trying to do is this:
At work, we've recently installed a new Dell PowerEdge 2800 server with 2
(single-core) 3.6GHz Xeon CPUs w/2MB L2 cache, 8GB of memory, and a few TB of
HDD space. We've installed the 2.4.27-2-686-smp kernel and it works fine
except for 2 things:
1) cat /proc/meminfo (and free) shows that it only sees 4GB of memory
2) cat /proc/cpuinfo and dmesg shows only the L1 cache (16K) and L2 cache
seems to have disappeared into thin air =(
I believe the solution to problem #1 is to modifiy the kernel settings and
set CONFIG_HIGHMEM64G=y (at the moment CONFIG_HIGHMEM4G=y, and the 64G one is
commented out), but I can't just edit the /boot/config-2.4.27-2-686-smp file
directly, hence I need a tutorial on kernel config.
As for problem #2, I have yet to find any clue whatsoever as to why it's
happening and how I can fix the problem, so if anybody can provide any sort
of insight to this, I would very much appreciate it.
the reason nothing is in /usr/src/linux is because you dont have the
source to the kernel (or you do, and it just isnt in /usr/src/). the
location of the kernel source tree is not that important.
so install the source, and some other tools to make a debian kernel
package:
# aptitude install kernel-source-2.4.27 fakeroot kernel-package
libncurses5-dev
let a normal user do stuff under /usr/src
# adduser glen src
logout, login
glen$ tar xfj /usr/src/kernel-source.2.4.27*.tar.bz2
get the config file for your current running kernel
tweak this tweak this
v
glen$ cp /boot/config-2.4.27 /usr/src/kernel-source-2.4.27/.config
glen$ cd /usr/src/kernel-source-2.4.27/ make oldconfig
glen$ make menuconfig
find the high mem option, it should be under the processor options
glen$ fakeroot make-kpkg clean
glen$ fakeroot make-kpkg --append-to-version=$(date +%Y%m%d.%H%M)
--initrd kernel_image
tweak this
vv
# dpkg -i /usr/src/kernel-image-2.4.27whatever.deb
reboot!
(i may have forgotten a step or two, :) but if you keep your old kernel
around you should always be able to boot into that.
-matt zagrabelny
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
