feat(memory/IO) This update optimizes memory throughput and I/O performance across all ROCKNIX AArch64 targets by enabling File-System-backed Transparent Huge Pages (THP) and implementing a tiered hardware-aware tuning strategy.

With MGLRU and zRAM providing a safety net, enabling Large Page (2MB) support reduces TLB misses, allowing the CPU to prioritize emulation logic over memory address translation. Key Features Enabled File-System THP (CONFIG_READ_ONLY_THP_FOR_FS): Collapses read-only file mappings (game binaries/data) into huge pages to accelerate asset loading. Contiguous Page Table Entries (CONFIG_ARM64_CONTPTE): Allows the MMU to treat groups of pages as a single entry, increasing TLB efficiency on high-performance targets. Memory Compaction & Migration: Re-enabled infrastructure to shuffle physical RAM into contiguous blocks required for huge pages. Architecture-Specific Write Support (CONFIG_ARCH_WANT_PMD_MKWRITE): Ensures efficient huge page handling during high-performance memory writes. Tiered Userspace Management The rocknix-memory-manager applies specific logic at boot based on the SoC and RAM capacity: Flagship Mode (RK3588, SM8x, RK3399): Sets defrag to defer+madvise for proactive huge page creation. Sets vm.compaction_proactiveness to 40 to maintain a pool of contiguous blocks. Budget Mode (H700, RK3326): Sets defrag to defer only to prevent CPU "stalls" during gameplay. Sets vm.compaction_proactiveness to 10 to prioritize raw CPU availability. Texture Performance: Globally enables shmem_enabled=advise to benefit Vulkan and Wayland texture handling. Swappiness: Sets vm.swappiness to 100 when ZRAM is active to keep physical RAM unfragmented for huge page allocations. Safety Rationale MGLRU: Prevents "reclaim storms" during huge page allocation on 1GB devices. zRAM: Absorbs memory pressure via high-speed compressed swap. Read-Only Focus: FS-Backed THP targets low-risk mappings while providing high-impact gains for asset streaming.
2026-03-31 14:41:55 -07:00 · 2026-02-04 21:29:12 +13:00
parent 281de1be24
commit a29ef69496
11 changed files with 106 additions and 41 deletions
--- a/projects/ROCKNIX/devices/H700/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/H700/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -1020,7 +1020,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 # CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 # CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
--- a/projects/ROCKNIX/devices/RK3326/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/RK3326/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_CAN_LINK_STATIC=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
@@ -962,7 +962,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 # CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
 CONFIG_ARCH_SUPPORTS_HUGE_PFNMAP=y
 CONFIG_ARCH_SUPPORTS_PMD_PFNMAP=y
--- a/projects/ROCKNIX/devices/RK3399/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/RK3399/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -546,6 +546,7 @@ CONFIG_ARM64_SME=y
 CONFIG_RELOCATABLE=y
 # CONFIG_RANDOMIZE_BASE is not set
 CONFIG_CC_HAVE_STACKPROTECTOR_SYSREG=y
+CONFIG_ARM64_CONTPTE=y
 # end of Kernel Features

 #
@@ -722,6 +723,7 @@ CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
 CONFIG_HAVE_ARCH_HUGE_VMAP=y
 CONFIG_HAVE_ARCH_HUGE_VMALLOC=y
 CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
+CONFIG_ARCH_WANT_PMD_MKWRITE=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_ARCH_WANTS_EXECMEM_LATE=y
@@ -959,9 +961,11 @@ CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
 CONFIG_SPLIT_PTE_PTLOCKS=y
 CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
 CONFIG_SPLIT_PMD_PTLOCKS=y
-# CONFIG_COMPACTION is not set
+CONFIG_COMPACTION=y
+CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 # CONFIG_PAGE_REPORTING is not set
 CONFIG_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -970,8 +974,19 @@ CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
 CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 # CONFIG_MEMORY_FAILURE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
+# CONFIG_PERSISTENT_HUGE_ZERO_FOLIO is not set
+CONFIG_MM_ID=y
+CONFIG_TRANSPARENT_HUGEPAGE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
+CONFIG_THP_SWAP=y
+CONFIG_READ_ONLY_THP_FOR_FS=y
+# CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
+CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
+CONFIG_ARCH_SUPPORTS_HUGE_PFNMAP=y
+CONFIG_ARCH_SUPPORTS_PMD_PFNMAP=y
 CONFIG_CMA=y
 # CONFIG_CMA_DEBUGFS is not set
 # CONFIG_CMA_SYSFS is not set
--- a/projects/ROCKNIX/devices/RK3566/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/RK3566/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -555,6 +555,7 @@ CONFIG_RANDOMIZE_BASE=y
 CONFIG_RANDOMIZE_MODULE_REGION_FULL=y
 CONFIG_CC_HAVE_STACKPROTECTOR_SYSREG=y
 CONFIG_STACKPROTECTOR_PER_TASK=y
+CONFIG_ARM64_CONTPTE=y
 # end of Kernel Features

 #
@@ -726,6 +727,7 @@ CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
 CONFIG_HAVE_ARCH_HUGE_VMAP=y
 CONFIG_HAVE_ARCH_HUGE_VMALLOC=y
 CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
+CONFIG_ARCH_WANT_PMD_MKWRITE=y
 CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_ARCH_WANTS_EXECMEM_LATE=y
@@ -935,9 +937,11 @@ CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
 CONFIG_SPLIT_PTE_PTLOCKS=y
 CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
 CONFIG_SPLIT_PMD_PTLOCKS=y
-# CONFIG_COMPACTION is not set
+CONFIG_COMPACTION=y
+CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 # CONFIG_PAGE_REPORTING is not set
 CONFIG_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_KSM=y
@@ -945,8 +949,19 @@ CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
 CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 # CONFIG_MEMORY_FAILURE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
+# CONFIG_PERSISTENT_HUGE_ZERO_FOLIO is not set
+CONFIG_MM_ID=y
+CONFIG_TRANSPARENT_HUGEPAGE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
+CONFIG_THP_SWAP=y
+CONFIG_READ_ONLY_THP_FOR_FS=y
+# CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
+CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
+CONFIG_ARCH_SUPPORTS_HUGE_PFNMAP=y
+CONFIG_ARCH_SUPPORTS_PMD_PFNMAP=y
 # CONFIG_CMA is not set
 CONFIG_PAGE_BLOCK_MAX_ORDER=10
 CONFIG_GENERIC_EARLY_IOREMAP=y
--- a/projects/ROCKNIX/devices/RK3588/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/RK3588/linux/linux.aarch64.conf
@@ -902,10 +902,12 @@ CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
 # CONFIG_MEMORY_HOTPLUG is not set
 CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
-# CONFIG_COMPACTION is not set
+CONFIG_COMPACTION=y
+CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 # CONFIG_PAGE_REPORTING is not set
 CONFIG_MIGRATION=y
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_ARCH_ENABLE_THP_MIGRATION=y
 CONFIG_CONTIG_ALLOC=y
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_MMU_NOTIFIER=y
@@ -914,7 +916,11 @@ CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
 CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 # CONFIG_MEMORY_FAILURE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
-# CONFIG_TRANSPARENT_HUGEPAGE is not set
+CONFIG_TRANSPARENT_HUGEPAGE=y
+# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
+CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_THP_SWAP=y
+CONFIG_READ_ONLY_THP_FOR_FS=y
 CONFIG_CMA=y
 # CONFIG_CMA_INACTIVE is not set
 # CONFIG_CMA_DEBUG is not set
--- a/projects/ROCKNIX/devices/S922X/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/S922X/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -964,7 +964,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 # CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 # CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
--- a/projects/ROCKNIX/devices/SDM845/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/SDM845/linux/linux.aarch64.conf
@@ -929,7 +929,7 @@ CONFIG_ZONE_DMA32=y
 CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
 # CONFIG_PERCPU_STATS is not set
 # CONFIG_GUP_TEST is not set
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 CONFIG_ARCH_HAS_PTE_SPECIAL=y
 CONFIG_SECRETMEM=y
 # CONFIG_ANON_VMA_NAME is not set
--- a/projects/ROCKNIX/devices/SM8250/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/SM8250/linux/linux.aarch64.conf
@@ -11,8 +11,9 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=108800
+CONFIG_RUST_IS_AVAILABLE=y
+CONFIG_RUSTC_LLVM_VERSION=190107
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -25,8 +26,6 @@ CONFIG_RUSTC_HAS_SLICE_AS_FLATTENED=y
 CONFIG_RUSTC_HAS_COERCE_POINTEE=y
 CONFIG_RUSTC_HAS_SPAN_FILE=y
 CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES=y
-CONFIG_RUSTC_HAS_FILE_WITH_NUL=y
-CONFIG_RUSTC_HAS_FILE_AS_C_STR=y
 CONFIG_PAHOLE_VERSION=0
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_TABLE_SORT=y
@@ -286,6 +285,7 @@ CONFIG_PERF_EVENTS=y

 CONFIG_SYSTEM_DATA_VERIFICATION=y
 CONFIG_PROFILING=y
+# CONFIG_RUST is not set

 #
 # Kexec and crash features
@@ -1073,7 +1073,7 @@ CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_NEVER=y
 # CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_WITHIN_SIZE is not set
 # CONFIG_TRANSPARENT_HUGEPAGE_TMPFS_HUGE_ADVISE is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 # CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
--- a/projects/ROCKNIX/devices/SM8550/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/SM8550/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -1077,7 +1077,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 # CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 # CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
--- a/projects/ROCKNIX/devices/SM8650/linux/linux.aarch64.conf
+++ b/projects/ROCKNIX/devices/SM8650/linux/linux.aarch64.conf
@@ -11,8 +11,8 @@ CONFIG_AS_VERSION=24400
 CONFIG_LD_IS_BFD=y
 CONFIG_LD_VERSION=24400
 CONFIG_LLD_VERSION=0
-CONFIG_RUSTC_VERSION=109300
-CONFIG_RUSTC_LLVM_VERSION=210108
+CONFIG_RUSTC_VERSION=109200
+CONFIG_RUSTC_LLVM_VERSION=210103
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
@@ -1077,7 +1077,7 @@ CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
 # CONFIG_TRANSPARENT_HUGEPAGE_NEVER is not set
 CONFIG_THP_SWAP=y
-# CONFIG_READ_ONLY_THP_FOR_FS is not set
+CONFIG_READ_ONLY_THP_FOR_FS=y
 # CONFIG_NO_PAGE_MAPCOUNT is not set
 CONFIG_PAGE_MAPCOUNT=y
 CONFIG_PGTABLE_HAS_HUGE_LEAVES=y
--- a/projects/ROCKNIX/packages/rocknix/sources/scripts/rocknix-memory-manager
+++ b/projects/ROCKNIX/packages/rocknix/sources/scripts/rocknix-memory-manager
@@ -38,6 +38,11 @@ KSM_ENABLE="${KSM_ENABLE:-$DEFAULT_KSM_ENABLE}"

 # --- 2. ENVIRONMENT & TIER DETECTION ---

+# Source environment to ensure HW_DEVICE is available
+if [ -f /etc/profile ]; then
+    . /etc/profile
+fi
+
 # Global RAM calc (MB)
 TOTAL_MEM_KB=$(awk '/MemTotal/ {print $2}' /proc/meminfo)
 TOTAL_MEM_MB=$((TOTAL_MEM_KB / 1024))
@@ -60,10 +65,8 @@ fi
 # even with lower RAM.
 IS_HIGH_PERF_SOC=false

-if [ -f /proc/device-tree/compatible ]; then
-    if grep -qE "rk3588|sm8|s922x|g12b|rk3399" /proc/device-tree/compatible; then
-        IS_HIGH_PERF_SOC=true
-    fi
+if [[ "${HW_DEVICE,,}" =~ rk3588|sm8|s922x|g12b|rk3399 ]]; then
+    IS_HIGH_PERF_SOC=true
 fi

 # Basic mount check
@@ -193,7 +196,8 @@ show_status() {
    # THP
    if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then
        local thp=$(grep -o '\[.*\]' /sys/kernel/mm/transparent_hugepage/enabled | tr -d '[]')
-        printf "  Huge Pages:     %s\n" "$thp"
+        local defrag=$(grep -o '\[.*\]' /sys/kernel/mm/transparent_hugepage/defrag | tr -d '[]')
+        printf "  Huge Pages:     %s (Defrag: %s)\n" "$thp" "$defrag"
    else
        printf "  Huge Pages:     Absent\n"
    fi
@@ -292,11 +296,12 @@ apply_vm_tuning() {
    # 2. Compaction Proactiveness
    local compaction_val=20
    if [[ "${VM_COMPACTION,,}" == "auto" ]]; then
-        if [ "$IS_HIGH_RAM" = true ]; then
-            compaction_val=50
-        elif [ "$IS_LOW_RAM" = true ] && [ "$IS_HIGH_PERF_SOC" = true ]; then
-            # Low RAM/High CPU can afford proactive compaction to help THP/allocs
-            compaction_val=30
+        if [ "$IS_HIGH_PERF_SOC" = true ]; then
+            # High-end chips can afford background cleanup to keep THP ready.
+            compaction_val=40
+        elif [ "$IS_LOW_RAM" = true ]; then
+            # Save CPU cycles on budget targets.
+            compaction_val=10
        else
            compaction_val=20
        fi
@@ -308,8 +313,29 @@ apply_vm_tuning() {
    fi

    # 3. Transparent Huge Pages
+    # Tiered THP Logic (FS MADVISE Synergy)
    if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then
+        # Default to madvise for all to prevent bloat
        echo madvise > /sys/kernel/mm/transparent_hugepage/enabled
+        
+        # Enable for Shared Memory (Crucial for Vulkan/Wayland textures)
+        if [ -f /sys/kernel/mm/transparent_hugepage/shmem_enabled ]; then
+            echo advise > /sys/kernel/mm/transparent_hugepage/shmem_enabled
+        fi
+
+        # Budget vs Flagship Defrag Logic
+        # On Budget devices (e.g. H700, RK3326), we use 'defer' so the system 
+        # never stalls while trying to find a contiguous 2MB block.
+        if [ "$IS_LOW_RAM" = true ] && [ "$IS_HIGH_PERF_SOC" = false ]; then
+            echo defer > /sys/kernel/mm/transparent_hugepage/defrag
+            logger -t memory-manager "THP: Budget mode enabled (defrag=defer)"
+        else
+            # Flagship (RK3588, SM8x) or powerful Mid-range (RK3399)
+            # Use defer+madvise to allow some synchronous compaction for 
+            # applications that explicitly think it is worth the performance.
+            echo "defer+madvise" > /sys/kernel/mm/transparent_hugepage/defrag
+            logger -t memory-manager "THP: Flagship mode enabled (defrag=defer+madvise)"
+        fi
    fi
 }

@@ -322,6 +348,9 @@ apply_tuning() {
    setup_ksm
    
    if [ "$ZRAM_SIZE_VAL" -gt 0 ]; then
+        # With ZRAM + MGLRU + THP, high swappiness ensures the system swaps 
+        # anonymous memory into compressed RAM, keeping physical RAM "unfragmented" 
+        # for Huge Page allocations.
        sysctl -w vm.swappiness=100 >/dev/null
        sysctl -w vm.page-cluster=0 >/dev/null