Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 15 May 2003 14:21:10 -0400 (EDT) | From | Bill Davidsen <> | Subject | Re: 2.5 kernels fail to start second CPU |
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On Thu, 15 May 2003, William Lee Irwin III wrote:
> On Thu, May 15, 2003 at 02:48:34AM -0700, William Lee Irwin III wrote: > > Sparse physical APIC ID's are not handled properly. This should correct > > them. > > I forgot to count the BSP in the initial count of the number of kicked > cpus. This patch does it correctly. > > To handle sparse physical APIC ID's properly the phys_cpu_present_map > must be scanned beyond bit NR_CPUS while ensuring no more than NR_CPUS > are woken in order not to attempt to wake non-addressible cpus. > > The following patch adds that logic to smp_boot_cpus() and corrects the > failure to wake secondaries reported by dhowells, with successful > wakeup, runtime, reboot, and halting reported after it was applied.
While you are (somewhat) on the topic of starting processors, I want to benchmark and application on a dual Xeon system. I want to try these configurations, preferably without opening the box, since it's in another time zone.
2 cpu w/ ht normal boot 2 cpu w/o ht noht 1 cpu w/o ht nosmp noht 1 cpu w/ ht ???
It looks as if maxcpus=2 counts physical units? I can't try it until Monday.
-- bill davidsen <davidsen@tmr.com> CTO, TMR Associates, Inc Doing interesting things with little computers since 1979.
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