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Message-ID: <4B350578.1000105@blueyonder.co.uk> Date: Fri, 25 Dec 2009 18:33:28 +0000 From: Sid Boyce <sboyce@...eyonder.co.uk> To: linux-kernel@...r.kernel.org Subject: Re: All kernels after 2.6.32-git10 show only 1 CPU On 25/12/09 07:38, Yinghai Lu wrote: > On Wed, Dec 23, 2009 at 8:55 AM, Sid Boyce <sboyce@...eyonder.co.uk> wrote: >> On the 4P box, 2.6.32-git10 boots and shows 4 CPU's, 2.6.32-git12 boots >> and shows 1 CPU, 2.6.32-git15 to 2.6.33-rc1-git3 1 CPU and lots of oops, >> continues with something like "Sending NMI interrupts to CPU's", >> [udev] unexpectedly returned with status 0x0100 >> [udev] failed while handling /devices/pci000:00 -----etc--- same for >> other devices. >> Unable to capture via serial console as USB doesn't come ready. >> >> On 2P laptop, up to 2.6.33-rc1 boots, 1 CPU and boot option "acpi=noirq" >> needed, without it boot hangs, I think from 2.6.32-git15. >> Building kernels, I have used the .config from previous kernel and >> "make oldconfig". >> >> # uname -r >> 2.6.32-git12-smp >> slipstream:~ # cat /proc/cpuinfo >> processor : 0 >> vendor_id : AuthenticAMD >> cpu family : 16 >> model : 4 >> model name : AMD Phenom(tm) II X4 940 Processor >> stepping : 2 >> cpu MHz : 3013.597 >> cache size : 512 KB >> physical id : 0 >> siblings : 1 >> core id : 0 >> cpu cores : 1 >> apicid : 0 >> initial apicid : 0 >> fpu : yes >> fpu_exception : yes >> cpuid level : 5 >> wp : yes >> flags : fpu vme de pse tsc msr pae mce cx8 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 up rep_good nonstop_tsc >> pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm >> sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt >> bogomips : 6027.18 >> 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 >> >> # uname -r >> 2.6.32-git10-smp >> >> # cat /proc/cpuinfo >> processor : 0 >> vendor_id : AuthenticAMD >> cpu family : 16 >> model : 4 >> model name : AMD Phenom(tm) II X4 940 Processor >> stepping : 2 >> cpu MHz : 3013.774 >> cache size : 512 KB >> physical id : 0 >> siblings : 4 >> core id : 0 >> cpu cores : 4 >> apicid : 0 >> initial apicid : 0 >> fpu : yes >> fpu_exception : yes >> cpuid level : 5 >> 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 pni monitor cx16 popcnt lahf_lm cmp_legacy svm >> extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt >> bogomips : 6027.53 >> 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 >> >> processor : 1 >> vendor_id : AuthenticAMD >> cpu family : 16 >> model : 4 >> model name : AMD Phenom(tm) II X4 940 Processor >> stepping : 2 >> cpu MHz : 3013.774 >> cache size : 512 KB >> physical id : 0 >> siblings : 4 >> core id : 1 >> cpu cores : 4 >> apicid : 1 >> initial apicid : 1 >> fpu : yes >> fpu_exception : yes >> cpuid level : 5 >> 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 pni monitor cx16 popcnt lahf_lm cmp_legacy svm >> extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt >> bogomips : 6027.27 >> 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 >> >> etc., up to processor 4. >> >> On a 2P laptop >> =============== >> tindog:~ # uname -r >> 2.6.33-rc1-smp >> >> tindog:~ # cat /proc/cpuinfo >> processor : 0 >> vendor_id : AuthenticAMD >> cpu family : 15 >> model : 67 >> model name : AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ >> stepping : 3 >> cpu MHz : 1000.000 >> cache size : 1024 KB >> physical id : 0 >> siblings : 1 >> core id : 0 >> cpu cores : 1 >> apicid : 0 >> initial apicid : 0 >> fpu : yes >> fpu_exception : yes >> cpuid level : 1 >> wp : yes >> flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca >> cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt >> rdtscp lm 3dnowext 3dnow up rep_good pni cx16 lahf_lm cmp_legacy svm >> extapic cr8_legacy >> bogomips : 2009.33 >> TLB size : 1024 4K pages >> clflush size : 64 >> cache_alignment : 64 >> address sizes : 40 bits physical, 48 bits virtual >> power management: ts fid vid ttp tm stc >> >> The .config for the 4P and 2.6.33-rc1-git3 attached. > > Can you disable MAXSMP? > > YH > > tindog:/usr/src/linux-2.6.33-rc2 # grep MAXSMP .config # CONFIG_MAXSMP is not set tindog:/usr/src/linux-2.6.33-rc2 # grep NUMA .config # CONFIG_NUMA is not set tindog:/usr/src/linux-2.6.33-rc2 # grep NUMA /usr/src/linux-2.6.33-rc1-git2/.config CONFIG_NUMA=y CONFIG_K8_NUMA=y CONFIG_X86_64_ACPI_NUMA=y CONFIG_NUMA_EMU=y CONFIG_ACPI_NUMA=y tindog:/usr/src/linux-2.6.33-rc2 # tindog:/usr/src # grep NUMA linux-2.6.33-rc2/.config CONFIG_NUMA=y CONFIG_K8_NUMA=y CONFIG_X86_64_ACPI_NUMA=y # CONFIG_NUMA_EMU is not set CONFIG_ACPI_NUMA=y The above is the 2P box showing just 1 CPU. Booting from an install DVD into rescue or booting the openSUSE kernel 2.6.32-3-default I have 2 CPU's. ----------------------------------------------------------------------- Below is the 4P box which shows 4 CPU's. slipstream:/usr/src/linux-2.6.33-rc2 # grep MAXSMP .config # CONFIG_MAXSMP is not set slipstream:/usr/src/linux-2.6.33-rc2 # grep NUMA .config CONFIG_NUMA=y CONFIG_K8_NUMA=y CONFIG_X86_64_ACPI_NUMA=y # CONFIG_NUMA_EMU is not set CONFIG_ACPI_NUMA=y slipstream:/usr/src/linux-2.6.33-rc2 # I decided to use the config from the openSUSE kernel as the basis of a new .config and 2.6.33-rc2 now shows 2 CPU's. Later I shall do a diff to see if anything stands out. tindog:~ # uname -r 2.6.33-rc2-smp tindog:~ # cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ stepping : 3 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 1 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 rdtscp lm 3dnowext 3dnow rep_good extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy bogomips : 2009.06 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ stepping : 3 cpu MHz : 1000.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 1 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 rdtscp lm 3dnowext 3dnow rep_good extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy bogomips : 2009.06 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc tindog:/usr/src/linux-2.6.33-rc2 # grep MAXSMP .config # CONFIG_MAXSMP is not set tindog:/usr/src/linux-2.6.33-rc2 # grep NUMA .config CONFIG_NUMA_IRQ_DESC=y <<====== One difference. CONFIG_NUMA=y CONFIG_K8_NUMA=y CONFIG_X86_64_ACPI_NUMA=y CONFIG_NUMA_EMU=y CONFIG_ACPI_NUMA=y Regards Sid. -- Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Specialist, Cricket Coach Microsoft Windows Free Zone - Linux used for all Computing Tasks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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