commit db2156eaddeafec0523aeccda45447b3069eb059
Author: Jim Gauld <james.gauld@windriver.com>
Date:   Fri Oct 16 15:41:34 2020 -0400

    Affine kswapd* kernel threads to platform cores
    
    The kswapd* kernel tasks are per NUMA node and have floating
    cpu affinity masks spanning those nodes.
    
    On AIO low-latency systems, this affines the kswapd* kernel tasks to
    platform cores. This is a performance improvement for low-latency
    sensitive applications.
    
    Partial-Bug: 1900174
    Change-Id: I20db19978362997b23a69bf591b8e7c23096f492
    Signed-off-by: Jim Gauld <james.gauld@windriver.com>

diff --git a/utilities/worker-utils/worker-utils/affine-platform.sh b/utilities/worker-utils/worker-utils/affine-platform.sh
index 72a7d63..4de4236 100755
--- a/utilities/worker-utils/worker-utils/affine-platform.sh
+++ b/utilities/worker-utils/worker-utils/affine-platform.sh
@@ -111,6 +111,11 @@ function affine_tasks {
             taskset --all-tasks --pid --cpu-list ${PLATFORM_CPULIST} $pid &> /dev/null
         done
 
+        # Affine kernel kswapd threads to platform cores
+        pidlist=$(ps --ppid 2 -p 2 -o pid=,comm= | grep -E 'kswapd' | awk '{ print $1; }')
+        for pid in ${pidlist[@]}; do
+            taskset --all-tasks --pid --cpu-list ${PLATFORM_CPULIST} $pid &> /dev/null
+        done
     fi
 
     return 0