From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02 Description of problem: Using RHEL WS 3.0 Update 1, with latest SMP kernel from up2date I have a P4 2.8Ghz HT (Enabled in the BIOS, it works in Windows XP and under RHEL WS 2.1 Update 3. Computer is HP D530 (Intel 865 MotherBoard) The kernel sees only 1 CPU, it should see 2 Here's cat /proc/cpu: [redvortex@ATQ-ADM-18 redvortex]$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 2.80GHz stepping : 9 cpu MHz : 2793.240 cache size : 512 KB physical id : 0 siblings : 1 runqueue : 0 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 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm bogomips : 5570.56 [redvortex@ATQ-ADM-18 redvortex]$ uname -a Linux ATQ-ADM-18.atq.2000 2.4.21-9.ELsmp #1 SMP Thu Jan 8 17:08:56 EST 2004 i686 i686 i386 GNU/Linux [redvortex@ATQ-ADM-18 redvortex]$ Version-Release number of selected component (if applicable): kernel-2.4.21-9ELsmp How reproducible: Always Steps to Reproduce: 1.install smp kernel on HT capable machine 2. 3. Actual Results: Should see 2 CPU's Expected Results: smp kernel should see 2cpu Additional info: dmesg Linux version 2.4.21-9.ELsmp (bhcompile.redhat.com) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-26)) #1 SMP Thu Jan 8 17:08:56 EST 2004 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000003f7f0000 (usable) BIOS-e820: 000000003f7f0000 - 0000000040000000 (reserved) BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) 119MB HIGHMEM available. 896MB LOWMEM available. found SMP MP-table at 000faa60 hm, page 000fa000 reserved twice. hm, page 000fb000 reserved twice. hm, page 000ed000 reserved twice. hm, page 000ee000 reserved twice. On node 0 totalpages: 260080 zone(0): 4096 pages. zone(1): 225280 pages. zone(2): 30704 pages. ACPI: Searched entire block, no RSDP was found. ACPI: RSDP located at physical address c00ea410 RSD PTR v0 [COMPAQ] __va_range(0xe5e40, 0x68): idx=33 mapped at fffdd000 ACPI table found: RSDT v1 [COMPAQ CPQ0064 8195.1808] ACPI: Too big length in RSDT: 128 Intel MultiProcessor Specification v1.4 Virtual Wire compatibility mode. OEM ID: COMPAQ Product ID: APIC at: 0xFEE00000 Processor #0 Pentium 4(tm) XEON(tm) APIC version 16 I/O APIC #1 Version 17 at 0xFEC00000. Processors: 1 xAPIC support is not present Enabling APIC mode: Flat. Using 1 I/O APICs Kernel command line: ro root=LABEL=/1 acpismp=force Initializing CPU#0 Detected 2793.225 MHz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 5570.56 BogoMIPS Memory: 1016800k/1040320k available (1685k kernel code, 20000k reserved, 1317k data, 224k init, 122816k highmem) Dentry cache
RedVortex
RedVortex is the original report of this issue,
This problem has been fixed in RHEL 3 U2. *** This bug has been marked as a duplicate of 106111 ***
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2004-188.html