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Message-ID: <x49r4x5hfuc.fsf@segfault.boston.devel.redhat.com> Date: Tue, 06 Mar 2012 11:08:43 -0500 From: Jeff Moyer <jmoyer@...hat.com> To: Sasha Levin <levinsasha928@...il.com> Cc: linux-kernel@...r.kernel.org Subject: Re: the maxcpus= boot parameter broke somewhere along the line Sasha Levin <levinsasha928@...il.com> writes: > On Tue, Mar 6, 2012 at 4:59 PM, Jeff Moyer <jmoyer@...hat.com> wrote: >> When booting my machine with maxcpus=1, it seems to be ignored with >> 3.3.0-rc3. I know that 3.1.0-rc3 works fine, but I haven't had time to >> track it down any further than that. I've attached the dmesg from my >> machine. Let me know if there is any other information that would help >> in solving this. > > [snip] > >> Brought up 1 CPUs >> Total of 1 processors activated (4256.06 BogoMIPS). > > Looks like it indeed brings up only one CPU, what's the problem there? Sorry, here's (what I perceive to be) the problem: [root@...allica ~]# uname -r 3.3.0-rc3+ [root@...allica ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3210 @ 2.13GHz stepping : 11 microcode : 0xb3 cpu MHz : 1600.002 cache size : 4096 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow vnmi flexpriority bogomips : 4256.06 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3210 @ 2.13GHz stepping : 11 microcode : 0xb3 cpu MHz : 1600.002 cache size : 4096 KB physical id : 0 siblings : 4 core id : 2 cpu cores : 4 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow vnmi flexpriority bogomips : 4256.06 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3210 @ 2.13GHz stepping : 11 microcode : 0xb3 cpu MHz : 1600.002 cache size : 4096 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 4 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow vnmi flexpriority bogomips : 4256.06 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3210 @ 2.13GHz stepping : 11 microcode : 0xb3 cpu MHz : 1600.002 cache size : 4096 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dts tpr_shadow vnmi flexpriority bogomips : 4256.06 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: Cheers, Jeff -- 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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