On Fri, 2009-10-16 at 19:38 +0200, Jens-Michael Hoffmann wrote: > Package: linux-image-2.6.30-2-amd64 > Version: 2.6.30-8 > Severity: normal > > The machine is a Dell Precision T7500 with 2 Nehalem CPUs. In the BIOS, memory > interleaving is set to "NUMA". It was the only BIOS option mentioning NUMA. > So I would expect that the kernel detects and uses NUMA. Oh, it *detects* NUMA all right. Unfortunately the ACPI tables: > [ 0.000000] ACPI: RSDP 00000000000febf0 00024 (v02 DELL ) > [ 0.000000] ACPI: XSDT 00000000000fcc27 0007C (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: FACP 00000000000fcd1f 000F4 (v03 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: DSDT 00000000ffe99f3d 056D5 (v01 DELL dt_ex 00001000 INTL 20050624) > [ 0.000000] ACPI: FACS 00000000bbdf9c00 00040 > [ 0.000000] ACPI: SSDT 00000000ffe9f733 000AC (v01 DELL st_ex 00001000 INTL 20050624) > [ 0.000000] ACPI: APIC 00000000000fce13 0016A (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: BOOT 00000000000fcf7d 00028 (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: ASF! 00000000000fcfa5 00096 (v32 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: MCFG 00000000000fd03b 0003E (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: HPET 00000000000fd079 00038 (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: TCPA 00000000000fd2d5 00032 (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: DMAR 00000000000fd307 00110 (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: SLIC 00000000000fd0b1 00024 (v01 DELL B10K 00000015 ASL 00000061) > [ 0.000000] ACPI: SSDT 00000000bbe4dc00 04784 (v01 INTEL PPM RCM 80000001 INTL 20061109) do not include the SRAT or SLIT tables which should describe the NUMA layout. > [ 0.000000] ACPI: Local APIC address 0xfee00000 > [ 0.000000] No NUMA configuration found So I think this indicates a firmware bug. It might be fixed by a later BIOS version; the latest is A03, available from: http://support.dell.com/support/downloads/download.aspx?fileid=344390&releaseid=R239339 Ben. -- Ben Hutchings It is impossible to make anything foolproof because fools are so ingenious.
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