Red Hat Bugzilla – Bug 129515
Installation of RHEL 3.0 U2 on EM64T (x86_64) servers report only UP kernel config being loaded/
Last modified: 2007-11-30 17:07:03 EST
Description of problem:
The initial nstallation of RHEL 3.0 U2 on EM64T (x86_64) servers
report only UP kernel config being loaded. Even though the server has
2 CPUs, the v2.4.21-15.EL kernel config is being loaded, not the
The CPUs are being reported twice in /proc/cpuinfo, ie. if there is 1
CPU, two are reported and if there are 2 CPUs, then four are reported.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Install RHEL 3.0 x86_64 on any EM64T capable system with either 3.0GHz
or 3.4GHz CPUs.
The kernel config reports itself as UP, instead of SMP, even when
multiple CPUs are installed in the host.
the kernel doesn't report UP; for example
cat /boot/config-`uname -r` | grep SMP
will show SMP.
So the v2.4.21-15.EL kernel will support the SMP and highmem systems
in the same kernel, correct? Therefore, for both EM64T and for AMD64
systems, only the v2.4.21-15.EL kernel need be selected, not the
for amd64 we decided to ship 2 kernel binaries, because UP amd64 boxes
do exist while for em64t, due to hyper threading, they don't.
Btw you cannot and should not determine the value of CONFIG_SMP based
on the kernel name.