diff --git a/configs/arcbox-arm64.config b/configs/arcbox-arm64.config
index 8c64ff5..2169fcc 100644
--- a/configs/arcbox-arm64.config
+++ b/configs/arcbox-arm64.config
@@ -22,6 +22,10 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_AIO=y
 CONFIG_NO_HZ_IDLE=y
+# Pressure stall information: in-guest memory/CPU/IO pressure signals.
+# The ArcBox agent's balloon pressure watch upgrades from meminfo/refault
+# sampling to PSI triggers when /proc/pressure is present.
+CONFIG_PSI=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BPF_SYSCALL=y
 CONFIG_BPF_JIT=y
diff --git a/configs/arcbox-x86_64.config b/configs/arcbox-x86_64.config
index 4c503d5..a3f6326 100644
--- a/configs/arcbox-x86_64.config
+++ b/configs/arcbox-x86_64.config
@@ -20,6 +20,10 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_AIO=y
 CONFIG_NO_HZ_IDLE=y
+# Pressure stall information: in-guest memory/CPU/IO pressure signals.
+# The ArcBox agent's balloon pressure watch upgrades from meminfo/refault
+# sampling to PSI triggers when /proc/pressure is present.
+CONFIG_PSI=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BPF_SYSCALL=y
 CONFIG_BPF_JIT=y