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[PATCH 0/3 V3] Cqm3 based on resctrl fs with MBM support

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  [PATCH 0/3 V3] Cqm3 based on resctrl fs with MBM support Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2017-08-09 20:50 +0200
    [PATCH 1/3] x86/intel_rdt/cqm: Add fix to clear the default RMID during hotcpu Vikas Shivappa <vikas.shivappa@linux.intel.com> - 2017-08-09 20:50 +0200

#1707753 — [PATCH 0/3 V3] Cqm3 based on resctrl fs with MBM support

Sending some changes to the V2 version based on Thomas feedback that the
worst case limbo processing in IPI was still not acceptable and to
improve the cache line access during scheduling.
This also includes a fix during hot cpu processing which was reported.

Patches are based on the tip/x86/cache (where the V2 was merged)

Vikas Shivappa (3):
  x86/intel_rdt/cqm: Add fix to clear the default RMID during hotcpu
  x86/intel_rdt: Modify the intel_pqr_state for better performance
  x86/intel_rdt/cqm: Improve limbo list processing

 arch/x86/include/asm/intel_rdt_sched.h   |  30 +++--
 arch/x86/kernel/cpu/intel_rdt.c          |  34 +++--
 arch/x86/kernel/cpu/intel_rdt.h          |  10 ++
 arch/x86/kernel/cpu/intel_rdt_monitor.c  | 209 +++++++++++++------------------
 arch/x86/kernel/cpu/intel_rdt_rdtgroup.c |  10 +-
 5 files changed, 146 insertions(+), 147 deletions(-)

-- 
1.9.1

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#1707754 — [PATCH 1/3] x86/intel_rdt/cqm: Add fix to clear the default RMID during hotcpu

The user configured per cpu default RMID is not cleared during cpu
hotplug. This may lead to incorrect RMID values after a cpu goes offline
and again comes back online. Clear the per cpu default RMID during cpu
offline and online handling.

Reported-by: Prakyha Sai Praneeth <sai.praneeth.prakhya@intel.com>
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
---
 arch/x86/kernel/cpu/intel_rdt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index da4f389..4b9edb2 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -551,6 +551,7 @@ static void clear_closid_rmid(int cpu)
 	struct intel_pqr_state *state = this_cpu_ptr(&pqr_state);
 
 	per_cpu(rdt_cpu_default.closid, cpu) = 0;
+	per_cpu(rdt_cpu_default.rmid, cpu) = 0;
 	state->closid = 0;
 	state->rmid = 0;
 	wrmsr(IA32_PQR_ASSOC, 0, 0);
-- 
1.9.1

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