LMKD PSI Activator

Magisk KSU APatch

LMKD PSI Activator is a root-level memory optimization module that switches Android's Low Memory Killer Daemon (LMKD) from legacy minfree_levels to real-time Pressure Stall Information (PSI) monitors. Built natively in C++ (fmiop), it dynamically manages swappiness, optimizes ZRAM utilization, and stops premature background app closures to deliver fluid multitasking under heavy loads.

Next-Gen Android RAM Management

Eliminate memory-pressure bottlenecks with accurate kernel PSI tracking and intelligent background compaction.

Native C++ Core (fmiop)

Compiled with high-efficiency C++ binaries to process kernel signals near-instantly with negligible battery drain and near-zero CPU footprint.

Dynamic Swappiness

Adjusts kernel swappiness values in real-time based on active RAM demand and CPU stall thresholds, preserving apps in memory while gaming or multitasking.

Smart ZRAM Tuning

Enables advanced VM parameters, ZRAM deduplication, and Userfaultfd (UFFD) garbage collection to minimize swap thrashing.

Under the Hood: PSI vs. Legacy Minfree

Traditional Android RAM management relies on coarse vmpressure events and static minfree watermarks, often producing false alarms that prematurely kill active background apps.

LMKD PSI Activator injects optimized system properties and orchestrates kernel pressure stall metrics (/proc/pressure/memory and /proc/pressure/cpu). By monitoring CPU, memory, and I/O stalls simultaneously, the daemon only initiates reclaim or kill operations when true hardware resource starvation occurs.

# Live memory pressure inspection via Termux / ADB logcat
$ su -c "logcat -s fmiop -v brief"
# Conceptual PSI dynamic control flow:
PSI_MEM_PRESSURE=$(cat /proc/pressure/memory | grep 'avg60')
if [ "$PSI_MEM_PRESSURE" -gt "THRESHOLD" ]; then
set_swappiness --dynamic --adaptive
trigger_lmkd_mode --psi
fi

Customizing via YAML Configuration

The daemon reads its runtime profile from /data/adb/modules/fmiop/config.yaml (or internal storage archive), allowing fine-grained control over dynamic swappiness sensitivity, time windows, and threshold limits.

swappiness_range Sets the lower and upper bounds for swapping aggression. A lower min bound improves gaming responsiveness; a higher max bound improves multitasking retention.
threshold_psi & time_window Selects between avg10, avg60, or avg300 sampling windows to calibrate how quickly the system reacts to memory pressure spikes.

Download LMKD PSI Activator

fmiop-v4.1.1_2053-beta.zip Size: 8.45 MB
View Latest Changelog

Module Info

  • Version v4.1.1_2053
  • Module By
    lululoid
  • Contributors lululoid
  • Source Code View Repository
  • Tags
    #LMKD PSI Activator #LMKD #Memory #Magisk Module #lululoid #Performance #RAM
  • Requirement
    Magisk KernelSU APatch
  • Latest Update

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