[Bugme-new] [Bug 16523] New: Kernel detects only 2 processors on Dual Xeon 5520HT on S5500BC mainboard

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Thu Aug 5 09:53:20 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=16523

           Summary: Kernel detects only 2 processors on Dual Xeon 5520HT
                    on S5500BC mainboard
           Product: ACPI
           Version: 2.5
    Kernel Version: 2.6.31.xx, 2.6.32.xx, 2.6.33.xx
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Config-Processors
        AssignedTo: acpi_config-processors at kernel-bugs.osdl.org
        ReportedBy: barzog at telecom.by
        Regression: No


We have server based on Intel S5500 chipset (platform SR1630BC) with dual E5520
(Quad Core with hyper-threading) installed. With 2.6.31.x,2.6.32.x and
2.6.33.xx system number of CPU is 2 instead of 16 (4 logical cores each with 2
threads).

See: http://bugs.gentoo.org/show_bug.cgi?id=308813

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