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Dobrý den, jsem si tam říkal, když má můj procesor HT, proč to nevyužívá, proč tu mam jenom jeden procesor ... Tak jsem se koukl do BIOSu a koukám, že to neni zapnutý, tak jsem to zapnul, začal bootovat a cca 2s po bootvani jadra se mi restartoval comp, sem si řikal, nějaký divný, tak jsem to zkusil ještě jednou a nic, tak jsem to vypnul, podíval jsem se po tom na netu a skusil jsem jádru předat acpi=ht ... To mi už šlo, přihlásil jsem se, ale jakmile jsem to odentroval, tak to rebootlo, na druhý pokus s acpi=ht jsem se už přihlásil, ale /proc/cpu_info vypisovalo jen jeden procesor ... Jádro mám 2.6.19, distribuci Fedora Core 6.

Výpis /proc/cpu_info při deaktivovaném HT(při aktivovaném má navíc info o počtu jader - 1):

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping        : 9
cpu MHz         : 2793.424
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up cid xtpr
bogomips        : 5588.90

Zkusil jsem kouknout do logů a našel jsem toho:

Apr 26 19:59:50 saly kernel: found SMP MP-table at 000fe710
Apr 26 19:59:50 saly kernel: Using x86 segment limits to approximate NX protection
Apr 26 19:59:50 saly kernel: Zone PFN ranges:
Apr 26 19:59:50 saly kernel:   DMA             0 ->     4096
Apr 26 19:59:50 saly kernel:   Normal       4096 ->   128880
Apr 26 19:59:50 saly kernel:   HighMem    128880 ->   128880
Apr 26 19:59:50 saly mcstransd: mcstransd starting
Apr 26 19:59:50 saly kernel: early_node_map[1] active PFN ranges
Apr 26 19:59:50 saly kernel:     0:        0 ->   128880
Apr 26 19:59:50 saly mcstransd: mcstransd initialized
Apr 26 19:59:50 saly kernel: DMI 2.3 present.
Apr 26 19:59:50 saly kernel: Using APIC driver default
Apr 26 19:59:50 saly kernel: ACPI: PM-Timer IO Port: 0x808
Apr 26 19:59:50 saly kernel: ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Apr 26 19:59:50 saly kernel: Processor #0 15:2 APIC version 20
Apr 26 19:59:50 saly kernel: ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
Apr 26 19:59:50 saly kernel: Processor #1 15:2 APIC version 20
Apr 26 19:59:50 saly kernel: ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] disabled)
Apr 26 19:59:50 saly kernel: ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] disabled)
Apr 26 19:59:50 saly kernel: Using ACPI for processor (LAPIC) configuration information
Apr 26 19:59:50 saly kernel: Intel MultiProcessor Specification v1.4
Apr 26 19:59:50 saly kernel:     Virtual Wire compatibility mode.
Apr 26 19:59:50 saly kernel: OEM ID: DELL     Product ID: Opti SX270   APIC at: 0xFEE00000
Apr 26 19:59:50 saly kernel: I/O APIC #2 Version 32 at 0xFEC00000.
Apr 26 19:59:50 saly kernel: Enabling APIC mode:  Flat.  Using 1 I/O APICs
Apr 26 19:59:50 saly kernel: Processors: 2
Apr 26 19:59:50 saly kernel: Allocating PCI resources starting at 20000000 (gap: 1f800000:df400000)
Apr 26 19:59:50 saly kernel: Detected 2793.194 MHz processor.
Apr 26 19:59:50 saly kernel: Built 1 zonelists.  Total pages: 127874
Apr 26 19:59:50 saly kernel: Kernel command line: ro root=LABEL=/ rhgb acpi=ht
Apr 26 19:59:50 saly kernel: Enabling fast FPU save and restore... done.
Apr 26 19:59:50 saly kernel: Enabling unmasked SIMD FPU exception support... done.
Apr 26 19:59:50 saly kernel: Initializing CPU#0
Apr 26 19:59:50 saly kernel: CPU 0 irqstacks, hard=c0806000 soft=c07e6000
Apr 26 19:59:50 saly kernel: PID hash table entries: 2048 (order: 11, 8192 bytes)
Apr 26 19:59:50 saly kernel: Console: colour VGA+ 80x25
Apr 26 19:59:50 saly kernel: Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Apr 26 19:59:50 saly kernel: Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Apr 26 19:59:50 saly kernel: Memory: 504144k/515520k available (2210k kernel code, 10852k reserved, 1131k data, 240k init, 0k highmem)
Apr 26 19:59:50 saly kernel: virtual kernel memory layout:
Apr 26 19:59:50 saly kernel:     fixmap  : 0xffc56000 - 0xfffff000   (3748 kB)
Apr 26 19:59:50 saly kernel:     pkmap   : 0xff800000 - 0xffc00000   (4096 kB)
Apr 26 19:59:50 saly kernel:     vmalloc : 0xe0000000 - 0xff7fe000   ( 503 MB)
Apr 26 19:59:50 saly kernel:     lowmem  : 0xc0000000 - 0xdf770000   ( 503 MB)
Apr 26 19:59:50 saly kernel:       .init : 0xc07a5000 - 0xc07e1000   ( 240 kB)
Apr 26 19:59:50 saly kernel:       .data : 0xc0628a27 - 0xc07438f4   (1131 kB)
Apr 26 19:59:50 saly kernel:       .text : 0xc0400000 - 0xc0628a27   (2210 kB)
Apr 26 19:59:50 saly kernel: Checking if this processor honours the WP bit even in supervisor mode... Ok.
Apr 26 19:59:50 saly kernel: Calibrating delay using timer specific routine.. 5588.91 BogoMIPS (lpj=2794459)
Apr 26 19:59:50 saly kernel: Security Framework v1.0.0 initialized
Apr 26 19:59:50 saly kernel: SELinux:  Initializing.
Apr 26 19:59:50 saly kernel: SELinux:  Starting in permissive mode
Apr 26 19:59:50 saly kernel: selinux_register_security:  Registering secondary module capability
Apr 26 19:59:50 saly kernel: Capability LSM initialized as secondary
Apr 26 19:59:51 saly kernel: Mount-cache hash table entries: 512
Apr 26 19:59:51 saly kernel: CPU: Trace cache: 12K uops, L1 D cache: 8K
Apr 26 19:59:51 saly kernel: CPU: L2 cache: 512K
Apr 26 19:59:51 saly kernel: CPU: Physical Processor ID: 0
Apr 26 19:59:51 saly kernel: Intel machine check architecture supported.
Apr 26 19:59:51 saly kernel: Intel machine check reporting enabled on CPU#0.
Apr 26 19:59:51 saly automount[2165]: lookup_read_master: lookup(nisplus): couldn't locat nis+ table auto.master
Apr 26 19:59:51 saly kernel: CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
Apr 26 19:59:51 saly kernel: CPU0: Thermal monitoring enabled
Apr 26 19:59:51 saly kernel: Checking 'hlt' instruction... OK.
Apr 26 19:59:51 saly kernel: SMP alternatives: switching to UP code
Apr 26 19:59:51 saly kernel: CPU0: Intel(R) Pentium(R) 4 CPU 2.80GHz stepping 09
Apr 26 19:59:51 saly kernel: SMP alternatives: switching to SMP code
Apr 26 19:59:51 saly kernel: Booting processor 1/1 eip 3000
Apr 26 19:59:51 saly kernel: CPU 1 irqstacks, hard=c0807000 soft=c07e7000
Apr 26 19:59:51 saly kernel: Not responding.
Apr 26 19:59:51 saly kernel: Inquiring remote APIC #1...
Apr 26 19:59:51 saly kernel: ... APIC #1 ID: failed
Apr 26 19:59:51 saly kernel: ... APIC #1 VERSION: failed
Apr 26 19:59:51 saly kernel: ... APIC #1 SPIV: failed
Apr 26 19:59:51 saly kernel: CPU #1 not responding - cannot use it.
Apr 26 19:59:51 saly kernel: Total of 1 processors activated (5588.91 BogoMIPS).
Apr 26 19:59:51 saly kernel: ExtINT not setup in hardware but reported by MP table
Apr 26 19:59:51 saly kernel: ENABLING IO-APIC IRQs
Apr 26 19:59:51 saly kernel: ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=0 pin2=0
Apr 26 19:59:51 saly kernel: Brought up 1 CPUs
Apr 26 19:59:51 saly kernel: checking if image is initramfs... it is
Apr 26 19:59:51 saly kernel: Freeing initrd memory: 1515k freed
Apr 26 19:59:51 saly kernel: NET: Registered protocol family 16
Apr 26 19:59:51 saly kernel: PCI: PCI BIOS revision 2.10 entry at 0xfbae8, last bus=1
Apr 26 19:59:51 saly kernel: PCI: Using configuration type 1
Apr 26 19:59:51 saly kernel: Setting up standard PCI resources
Apr 26 19:59:51 saly kernel: ACPI: Interpreter disabled.
Apr 26 19:59:51 saly kernel: Linux Plug and Play Support v0.97 (c) Adam Belay

Podstatný je asi to CPU #1 not responding - cannot use it. a ty 3 řádky nad tim ... Nevím si s tím rady ... Četl jsem o tom v bugzille(tedy myslím, že to je můj problém - https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169816), opravilo se to v 2.6.15 jádře(podle bugzilly), ale v mém jádře to nejede ... :-/ ... Také jsem narazil na http://blog.wuwej.net/2005/11/30/linux-vii-fedora-core-4-pentium-4-ht-a-smp-jadro.html odkud jsem našel to acpi=ht ... To je asi všechno, co bych mohl poskytnout za info, co mě napadá ... Děkuji za odpovědí ...