Re: [Bug #11224] Only three cores found on quad-core machine.

Nick Piggin
2008-10-07T15:18:35Z

On Sunday 05 October 2008 04:32, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.26. Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11224
> Subject : Only three cores found on quad-core machine.
> Submitter : Dave Jones <davej@redhat.com>
> Date : 2008-08-01 18:15 (65 days old)
> References : http://marc.info/?l=linux-kernel&m=121761475224719&w=4

Dave, is your CPU2 getting stuck in calibrate_delay? Can you still
reproduce the bug? What if you boot the kernel with lpj=<something sane
like 2666785> in order to skip the calibrate_delay code?

If that helps, can you try adding some printks to narrow down where it
is getting stuck?