- Implement MiShutdownMemoryManager (stops MPW thread and writes all dirty pages to disk).

- Move MiShutdownMemoryManager invocation to where it should really happen (before filesystems shutdown).
- As a result, MPW doesn't have a chance to flush pages when filesystems are already down. However, 1st assertion as mentioned in bug 2872 still happens. 2nd one is gone.
See issue #2872 for more details.

svn path=/trunk/; revision=32547

reactos/ntoskrnl/ex/shutdown.c

@@ -167,13 +167,12 @@ ShutdownThreadMain(PVOID Context)
      }
 
    PspShutdownProcessManager();
-   
+
    CmShutdownSystem();
+   MiShutdownMemoryManager();
    IoShutdownRegisteredFileSystems();
    IoShutdownRegisteredDevices();
 
-   MiShutdownMemoryManager();
-
    if (Action == ShutdownNoReboot)
      {
         HalDisplayString("\nYou can switch off your computer now\n");

reactos/ntoskrnl/mm/mminit.c

@@ -57,6 +57,9 @@ ULONG_PTR MmPfnDatabaseEnd;
 PMEMORY_ALLOCATION_DESCRIPTOR MiFreeDescriptor;
 MEMORY_ALLOCATION_DESCRIPTOR MiFreeDescriptorOrg;
 extern KMUTANT MmSystemLoadLock;
+extern HANDLE MpwThreadHandle;
+extern BOOLEAN MpwThreadShouldTerminate;
+extern KEVENT MpwThreadEvent;
 BOOLEAN MiDbgEnableMdDump =
 #ifdef _ARM_
 TRUE;
@@ -70,7 +73,33 @@ VOID
 NTAPI
 MiShutdownMemoryManager(VOID)
 {
+    ULONG PagesWritten;
+    PETHREAD Thread;
 
+    /* Ask MPW thread to shutdown */
+    MpwThreadShouldTerminate = TRUE;
+    KeSetEvent(&MpwThreadEvent, IO_NO_INCREMENT, FALSE);
+
+    /* Wait for it */
+    ObReferenceObjectByHandle(MpwThreadHandle,
+                              THREAD_ALL_ACCESS,
+                              PsThreadType,
+                              KernelMode,
+                              (PVOID*)&Thread,
+                              NULL);
+
+    KeWaitForSingleObject(Thread,
+                          Executive,
+                          KernelMode,
+                          FALSE,
+                          NULL);
+
+    ObDereferenceObject(Thread);
+
+    /* Check if there are any dirty pages, and flush them.
+       There will be no other chance to do this later, since filesystems
+       are going to be shut down. */
+    CcRosFlushDirtyPages(128, &PagesWritten);
 }
 
 VOID
@@ -401,13 +430,10 @@ MmInit1(VOID)
     MmPagedPoolBase = (PVOID)PAGE_ROUND_UP((ULONG_PTR)MiNonPagedPoolStart +
                                            MiNonPagedPoolLength);
     MmPagedPoolSize = MM_PAGED_POOL_SIZE;
-    
     /* Dump kernel memory layout */
     MiDbgKernelLayout();
-    
     /* Initialize the page list */
     MmInitializePageList();
-    
     /* Unmap low memory */
     MmDeletePageTable(NULL, 0);
 

reactos/ntoskrnl/mm/mpw.c

@@ -17,10 +17,10 @@
 
 /* GLOBALS *******************************************************************/
 
-static HANDLE MpwThreadHandle;
+HANDLE MpwThreadHandle;
 static CLIENT_ID MpwThreadId;
-static KEVENT MpwThreadEvent;
-static volatile BOOLEAN MpwThreadShouldTerminate;
+KEVENT MpwThreadEvent;
+BOOLEAN MpwThreadShouldTerminate;
 
 /* FUNCTIONS *****************************************************************/