Red Hat Bugzilla – Bug 177445
Please consider upping NR_CPUS to 16 for x86_64
Last modified: 2007-11-30 17:07:22 EST
Description of problem:
On a 4 CPU, dual-core, HT-enabled EM64T system only 8 "CPUs" are recognized.
Please consider building the x86_64 kernels with NR_CPUS set to 16 or more.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot system
There should be 16 CPUs visible
Only 8 CPUs are visible, dmesg shows that the limit of NR_CPUS=8 is exceeded.
We're adding a 'largesmp' kernel in U3 that will support 64 cpus for x86_64. You
can test that kernel out via the beta channel.
*** This bug has been marked as a duplicate of 163641 ***
thanks for the update. For some reason I did not find 163641. Apparently I did
not look hard enough :-) What will be the limit in the U3 kernel?
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.