linux-kernel - [PATCH 0/2] x86/CPU/AMD: Fix multi-die processor topology info

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Date:   Tue, 27 Jun 2017 01:40:51 -0500
From:   Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To:     x86@...nel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Cc:     bp@...en8.de, bp@...e.de, leo.duran@....com, yazen.ghannam@....com,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: [PATCH 0/2] x86/CPU/AMD: Fix multi-die processor topology info

This patch series changes how kernel derives cpu "package" from
package-as-socket to package-as-die in order to fix following issues
on AMD family17h multi-die processor platforms:

 * irqbalance fails to allocating IRQs to individual CPU within the die.

 * The scheduler fails to load-balance across 8 threads within a die
   (e.g. running 8-thread application w/ taskset -c 0-7 ) with
   the DIE schedule domain omitted due to x86_has_numa_in_package. 

These issues are fixed when properly intepretes package as DIE.

This series has also been tested on existing AMD systems w/ family15h
and family10h multi-die processors.

Suravee Suthikulpanit (2):
  x86/CPU/AMD: Present package as die instead of socket
  x86/CPU/AMD: Use L3 Cache info from CPUID to determine LLC ID

 arch/x86/kernel/cpu/amd.c | 205 ++++++++++++++++++++++++++++------------------
 1 file changed, 124 insertions(+), 81 deletions(-)

-- 
2.7.4