[Bug]Handle xapic/x2apic entries in MADT
Bug #1519636 reported by
XiongZhang
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| intel |
Fix Released
|
Undecided
|
Unassigned | ||
| linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
| Xenial |
Fix Released
|
Undecided
|
Unassigned | ||
Bug Description
In case when BIOS is populating MADT wiht both x2apic and local apic entries (as per ACPI spec), kernel builds it's processor table
in the following order: BSP, X2APIC, local APIC, resulting in processors on the same core are not separated by core count.
Platform: KNL
this is fixed in 4.4 kernel with:
d81056b x86, ACPI: Handle apic/x2apic entries in MADT in correct order
9b3fedd ACPI / tables: Add acpi_subtable_proc to ACPI table parsers
| information type: | Proprietary → Public |
| Changed in linux (Ubuntu Xenial): | |
| status: | New → Fix Released |
| Changed in intel: | |
| status: | New → Fix Released |
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