how can I upgrade kernel from 2.4.9-e3 to 2.4.9-e12 ?

[richeal75]

hello ,

I'm a beginner of Redhat linux , and now I want to get a simple way to upgrade my redhat AS 2.1 with kernel 2.4.9-e3 to 2.4.9-e12

thanks for your help in advance !

[TwoProc · Accepted solution]

If you've bought a support license - the easiest way is to run "rhn-configure", then run "up2date". The new kernel will be offered us a choice to install.

[Gopi Sekar]

my same answer copied from other thread:

The simplest way would be to use up2date utility with RHN subscription. then you can use this utility to update all the packages in your system including kernel or you can specify which paackage you want update and get them updated.

Also the 2.4.9-e12 kernel is outdated and there is a new kernel which includes this fix along with few other fixes, check out the following link about it.
http://rhn.redhat.com/errata/RHSA-2005-283.html

the above link also gives instruction on how to upgrade the kernel from command line.

anyway even to download the kernel manually you need to have RHN subscription.

Regards,
Gopi

[richeal75]

Hello ,

I can find "low_io_sectors" and "high_io_setcotrs" in /proc/sys/vm after i upgrade kernel from 2.4.9-e3 to 2.4.9-e62

and then I adjust them as below:

echo 2000 /proc/sys/vm/low_io_sectors
echo 4000 /proc/sys/vm/high_io_sectors

and then result is ok as below

2000 /proc/sys/vm/low_io_sectors
4000 /proc/sys/vm/high_io_sectors

and I run " more /proc/sys/vm/low_io_sectors"
but I find the value is not changed

why ?

[TwoProc]

You need to redirect ...

echo 2000 > /proc/sys/vm/low_io_sectors
echo 4000 > /proc/sys/vm/high_io_sectors
(you forgot the ">").

If you want the values to "stick" between reboots you need to add the values to the
/etc/sysctl.conf
file.

make yourself a nice section at the bottom
of the file...
# Custom Richeal
vm.low_io_sectors=2000
vm.high_io_sectors=4000

Now, your parameters are set during runtime, and the next time you boot, they'll be back.

BTW, My numbers are MUCH bigger than yours (and I've not changed them). So, I assume that you're lowering these numbers - why? Are you going for a performance boost in there? If so, share with us why you're doing it so we can learn too.