Bug 129515 - Installation of RHEL 3.0 U2 on EM64T (x86_64) servers report only UP kernel config being loaded/
Installation of RHEL 3.0 U2 on EM64T (x86_64) servers report only UP kernel c...
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brian Brock
Depends On:
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Reported: 2004-08-09 17:40 EDT by Heather Conway
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2004-08-09 17:41:52 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Heather Conway 2004-08-09 17:40:36 EDT
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):

How reproducible:
Every time.

Steps to Reproduce:
Install RHEL 3.0 x86_64 on any EM64T capable system with either 3.0GHz
or 3.4GHz CPUs.
Actual results:
The kernel config reports itself as UP, instead of SMP, even when
multiple CPUs are installed in the host.

Expected results:

Additional info:
Comment 1 Arjan van de Ven 2004-08-09 17:41:52 EDT
the kernel doesn't report UP; for example 
cat /boot/config-`uname -r` | grep SMP
will show SMP.
Comment 2 Heather Conway 2004-08-09 17:48:40 EDT
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
v2.4.21-15.ELsmp, correct?

Comment 3 Arjan van de Ven 2004-08-09 17:50:21 EDT
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.
Comment 4 Heather Conway 2004-08-09 17:50:45 EDT
Got it...thanks.

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