Bug 19952
| Summary: | Disabling CPU cores causes system not to boot | ||
|---|---|---|---|
| Product: | Platform Specific/Hardware | Reporter: | Dan Dart (dandart) |
| Component: | x86-64 | Assignee: | platform_x86_64 (platform_x86_64) |
| Status: | RESOLVED OBSOLETE | ||
| Severity: | normal | CC: | alan |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.35.x | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | lshw | ||
Created attachment 32972 [details] lshw I have a Phenom II X6 booting 2.6.35.4 on Ubuntu. On disabling 4 cores (hey, I only need 2 unless I'm doing some hardcore number crunching) the system wouldn't boot at all - showing a message that related to that it couldn't find the cores and would therefore halt. cpuinfo: processor : [[0-5]] vendor_id : AuthenticAMD cpu family : 16 model : 10 model name : AMD Phenom(tm) II X6 1055T Processor stepping : 0 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 6 core id : 5 cpu cores : 6 apicid : 5 initial apicid : 5 fpu : yes fpu_exception : yes cpuid level : 6 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb npt lbrv svm_lock nrip_save bogomips : 5631.41 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate [9] lshw attached.