replace the VHD/diskpart disk image pipeline with a directory-based vvfat root, we'll see when it breaks, fix /O2, add an all_tests, generalize the fat32 driver into a fat 16+32 driver, change policy on volume drivers, collapse KCPU's fields into a single atomic KE_CPU_STATE state machine, move scheduler ticking to per-CPU LAPIC timers, gate verbose SMP topology logging behind selftest diagnostics and add SMP pool-checkpoint validation around AP admission, add checked intrusive list helpers behind a new KE_DEBUG_LIST_CHECKS flag, add ObInitializeObjectHeader/ObTryReferenceObject, add waitable display clock objects and a SYS_OPEN_DISPLAY_CLOCK syscall for vsync-style waits, refactor kernel input into a per-queue KE_INPUT_CONTEXT with its own key/mouse ring buffers and DPC-driven key repeat, add KeInputQueuePeekEvent/ReadEvent/WaitKey and a SYS_QUERY_GLOBAL_INPUT_STATE syscall, split the kernel pool allocator out of mm_virt, new video files!

code/user/tests/dirty_writeback/dirty_writeback.c

@@ -68,11 +68,14 @@ static void delete_path(const char* path) {
 }
 
 static uint32_t create_temp(uint32_t* fileOut, const char** pathOut) {
+    // Writable QEMU vvfat maps long-name creation through a host rename and
+    // can abort before the guest receives an I/O status. Keep this file in
+    // 8.3 form so the test measures writeback rather than the host bridge.
     static const char* paths[] = {
-        "dirty_writeback.tmp",
-        "/dirty_writeback.tmp",
-        "1:/dirty_writeback.tmp",
-        "0:/dirty_writeback.tmp",
+        "dwrite.tmp",
+        "/dwrite.tmp",
+        "1:/dwrite.tmp",
+        "0:/dwrite.tmp",
     };
 
     for (size_t i = 0; i < sizeof(paths) / sizeof(paths[0]); ++i) {