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 vvvvvvvvvvvvv vvvvvvvvvvvvvvvvvvvv 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 vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv # dpkg -i /usr/src/kernel-image-2.4.27<whatever>.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]
