Enable CONFIG_HID_PLAYSTATION and CONFIG_PLAYSTATION_FF on the H700
device. Without this, DualShock 4 and DualSense controllers fall back
to hid-generic, which maps axes differently (swapped right stick and
triggers), causing erratic behavior in RetroArch and other emulators.
The hid-playstation driver (which replaced hid-sony for DS4 in kernel
6.2+) provides correct axis mapping and force feedback support.
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.
#2150 added a blanket seat attach wildcard which resolved an input bug for the AYN Thor. It unknowingly caused an input bug in the RG DS. Put the specific needs behind $QUIRK_DEVICE conditionals.
