uint32_t x, y; // Linear search through the labyrinth using atomic hints for (int i = 0; i < maze->width * maze->height; i++) // Convert linear index to 2D coordinates x = i % maze->width; y = i / maze->width; // Attempt to atomically claim this page // exclusive: only if the current flag is FREE (0) if (atomic_compare_exchange(&maze->page_map[y * maze->width + x], 0, ALLOCATED)) // mark exclusive (owner thread ID stored elsewhere) maze->exclusive_owner[i] = get_current_thread_id(); return maze->pages[y * maze->width + x];
— A complex network of passages or paths; a maze. Figuratively, a complicated or confusing arrangement or situation.
To understand this definition, we must break down its constituent parts and examine how they interact to provide safe, high-speed memory access. Breaking Down the Syntax 1. Labyrinth / Void
: Atomic allocations are more likely to fail than "normal" (GFP_KERNEL) allocations because the system cannot perform disk swapping or page out other data to make room.