On 09/06/2017 02:36 PM, Prarit Bhargava wrote: > A system booted with a small number of cores enabled per package > panics because the estimate of __max_logical_packages is too low. > This occurs when the total number of active cores across all packages > is less than the maximum core count for a single package. > > ie) On a 4 package system with 20 cores/package where only 4 cores > are enabled on each package, the value of __max_logical_packages is > calculated as DIV_ROUND_UP(16 / 20) = 1 and not 4. > > Improve the estimate of __max_logical_packages by comparing the current > estimate to the number of SMBIOS type 4 Processor Information structures. > If __max_logical_packages is still insufficient during boot use the largest > possible value of Package ID.
If I move this calculation to native_smp_cpus_done() I can eliminate a chunk of code and use boot_cpu_data.booted_cores to get a correct value. I'll resubmit with a new patch. P.
