On Wednesday, September 09, 2015 03:47:27 PM Lukasz Anaczkowski wrote: > This series of patches attempts to fix how CPUs are enumerated by kernel when > there's more than 255 of them on single processor. > In such case, BIOS may interleave APIC/X2APIC MADT subtables, to obey > requirements > specified in ACPI spec. Without this patches, kernel then would first > enumerate > BSP, then X2APIC then APIC, resulting in low APIC IDs to be assigned with high > logical IDs and high APIC IDs to be assigned low logical IDs. Biggest > consequence > of that could be performance penalties due to wrong L2 cache sharing. > More details in patch 2/2. > > Also, simpler approach has been considered, which did not required ACPI > parsing > interface changes, however it failed to meet requirements. More details can be > found here: https://lkml.org/lkml/2015/9/7/285 > > Lukasz Anaczkowski (2): > acpi: Added acpi_subtable_proc to ACPI table parsers > x86, acpi: Handle apic/x2apic entries in MADT in correct order > > arch/x86/kernel/acpi/boot.c | 22 +++++++++-- > drivers/acpi/tables.c | 91 > ++++++++++++++++++++++++++++++++++++--------- > include/linux/acpi.h | 19 ++++++++-- > 3 files changed, 107 insertions(+), 25 deletions(-)
OK Does anyone in the CC have any objections against merging this series? If not, I'll queue it up as 4.3-rc material. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
