Genp - Linux

// Borrow from global pool (temporary) void *borrowed = genp_borrow(part, 256 * 1024, 100); // 100 ms timeout

When you hear "memory management" in Linux, you likely think of the Buddy Allocator, slab , or malloc . But there is a lesser-known, powerful concept used in specialized real-time and embedded Linux kernels: Generalized Partitioning (GenP) .

: If you’re curious, grab the LITMUS^RT kernel (which implements resource partitioning) or look into the PikeOS hypervisor’s Linux guest partitioning. genp linux

GenP relaxes those rules. It defines partitions (hard boundaries) but allows intra-partition dynamic allocation using standard heap managers. Additionally, GenP often introduces a global memory pool that partitions can borrow from—provided they return it within a bounded time. In short: GenP = Spatial isolation (partitioning) + Temporal borrowing (flexibility). | Feature | Standard Linux (Buddy + Slab) | GenP Linux | |---------|-------------------------------|------------| | Fragmentation | Possible over time | Controlled per partition | | Worst-case allocation time | Unbounded (scanning) | Bounded (O(1) per partition) | | Interference | High (one app can starve another) | Low (partition budgets enforced) | | Real-time guarantee | Best-effort | Deterministic | | Memory waste | Low (overcommit possible) | Higher (pre-reserved partitions) | How GenP Works Inside the Kernel GenP is not a single patch but a set of modifications typically found in real-time Linux variants (e.g., PREEMPT_RT with partitioning extensions, LynxOS, or VxWorks-inspired layers).

If you are working on safety-critical systems (automotive, avionics, medical devices) or need ultra-low latency without sacrificing CPU utilization, GenP deserves your attention. Generalized Partitioning is a memory and resource management strategy that combines the predictability of static partitioning with the flexibility of dynamic allocation . // Borrow from global pool (temporary) void *borrowed

#include <genp.h> int main() // Create a partition with 2MB private + 1MB borrow limit genp_partition_t *part = genp_create(2 * 1024 * 1024, 1 * 1024 * 1024);

// Return borrowed memory early genp_return(borrowed); GenP relaxes those rules

Have you used partitioned memory in a real-time Linux project? Let me know in the comments! About the author : A Linux kernel enthusiast focused on real-time and embedded systems. Find me on GitHub or Twitter.