[Bugme-new] [Bug 19952] New: Disabling CPU cores causes system not to boot
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Sat Oct 9 04:06:06 PDT 2010
https://bugzilla.kernel.org/show_bug.cgi?id=19952
Summary: Disabling CPU cores causes system not to boot
Product: Platform Specific/Hardware
Version: 2.5
Kernel Version: 2.6.35.x
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: x86-64
AssignedTo: platform_x86_64 at kernel-bugs.osdl.org
ReportedBy: dandart at googlemail.com
Regression: No
Created an attachment (id=32972)
--> (https://bugzilla.kernel.org/attachment.cgi?id=32972)
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.
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