Messages in this thread Patch in this message | | | From | Vikas Shivappa <> | Subject | [PATCH 1/3] x86/intel_rdt/cqm: Add fix to clear the default RMID during hotcpu | Date | Wed, 9 Aug 2017 11:46:33 -0700 |
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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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