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.
// Allocate from private partition heap void *private_buf = genp_alloc(part, 512 * 1024);
: 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
#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);
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) . Have you used partitioned memory in a real-time
Here’s a simplified architecture:
// Borrow from global pool (temporary) void *borrowed = genp_borrow(part, 256 * 1024, 100); // 100 ms timeout Find me on GitHub or Twitter
The kernel ensures that if genp_return() is not called within 100 ms, the global reclaim thread forcefully revokes the memory—even if it means invalidating the process’s mapping (handled via SIGSEGV recovery in safe designs). You might think: “Can’t cgroups limit memory and mlockall() lock pages?”