[CMLIB]

- Increase Hive dirty counter when marking cells as dirty
 - Clear the counter accordingly when flushing the hive
[NTOSKRNL]
 - Lazy flush the registry when unlocking it
 - Correctly update hive lazy flush count when actully flushing it
 - Respect the force flush parameter
CORE-6762 #comment Should be fixed with r61783, let's see what testbot says.

svn path=/trunk/; revision=61783

reactos/lib/cmlib/hivecell.c

@@ -120,6 +120,7 @@ HvMarkCellDirty(
 
    RtlSetBits(&RegistryHive->DirtyVector,
               CellBlock, CellLastBlock - CellBlock);
+   RegistryHive->DirtyCount++;
    return TRUE;
 }
 

reactos/lib/cmlib/hivewrt.c

@@ -265,6 +265,7 @@ HvSyncHive(
 
    /* Clear dirty bitmap. */
    RtlClearAllBits(&RegistryHive->DirtyVector);
+   RegistryHive->DirtyCount = 0;
 
    return TRUE;
 }

reactos/ntoskrnl/config/cmlazy.c

@@ -23,7 +23,7 @@ BOOLEAN CmpLazyFlushPending;
 BOOLEAN CmpForceForceFlush;
 BOOLEAN CmpHoldLazyFlush = TRUE;
 ULONG CmpLazyFlushIntervalInSeconds = 5;
-ULONG CmpLazyFlushHiveCount = 7;
+static ULONG CmpLazyFlushHiveCount = 7;
 ULONG CmpLazyFlushCount = 1;
 LONG CmpFlushStarveWriters;
 
@@ -31,9 +31,9 @@ LONG CmpFlushStarveWriters;
 
 BOOLEAN
 NTAPI
-CmpDoFlushNextHive(IN BOOLEAN ForceFlush,
-                   OUT PBOOLEAN Error,
-                   OUT PULONG DirtyCount)
+CmpDoFlushNextHive(_In_  BOOLEAN ForceFlush,
+                   _Out_ PBOOLEAN Error,
+                   _Out_ PULONG DirtyCount)
 {
     NTSTATUS Status;
     PLIST_ENTRY NextEntry;
@@ -51,13 +51,10 @@ CmpDoFlushNextHive(IN BOOLEAN ForceFlush,
     /* Make sure we have to flush at least one hive */
     if (!HiveCount) HiveCount = 1;
 
-    /* Don't force flush */
-    CmpForceForceFlush = FALSE;
-
     /* Acquire the list lock and loop */
     ExAcquirePushLockShared(&CmpHiveListHeadLock);
     NextEntry = CmpHiveListHead.Flink;
-    while (NextEntry != &CmpHiveListHead)
+    while ((NextEntry != &CmpHiveListHead) && HiveCount)
     {
         /* Get the hive and check if we should flush it */
         CmHive = CONTAINING_RECORD(NextEntry, CMHIVE, HiveList);
@@ -67,17 +64,21 @@ CmpDoFlushNextHive(IN BOOLEAN ForceFlush,
             /* Great sucess! */
             Result = TRUE;
 
-            /* Ignore clean or volatile hves */
-            if (!(CmHive->Hive.DirtyCount) ||
+            /* One less to flush */
+            HiveCount--;
+
+            /* Ignore clean or volatile hives */
+            if ((!CmHive->Hive.DirtyCount && !ForceFlush) ||
                 (CmHive->Hive.HiveFlags & HIVE_VOLATILE))
             {
                 /* Don't do anything but do update the count */
                 CmHive->FlushCount = CmpLazyFlushCount;
+                DPRINT("Hive %wZ is clean.\n", &CmHive->FileFullPath);
             }
             else
             {
                 /* Do the sync */
-                DPRINT1("Flushing: %wZ\n", CmHive->FileFullPath);
+                DPRINT1("Flushing: %wZ\n", &CmHive->FileFullPath);
                 DPRINT1("Handle: %p\n", CmHive->FileHandles[HFILE_TYPE_PRIMARY]);
                 Status = HvSyncHive(&CmHive->Hive);
                 if(!NT_SUCCESS(Status))
@@ -85,7 +86,9 @@ CmpDoFlushNextHive(IN BOOLEAN ForceFlush,
                     /* Let them know we failed */
                     *Error = TRUE;
                     Result = FALSE;
+                    break;
                 }
+                CmHive->FlushCount = CmpLazyFlushCount;
             }
         }
         else if ((CmHive->Hive.DirtyCount) &&
@@ -95,6 +98,7 @@ CmpDoFlushNextHive(IN BOOLEAN ForceFlush,
             /* Use another lazy flusher for this hive */
             ASSERT(CmHive->FlushCount == CmpLazyFlushCount);
             *DirtyCount += CmHive->Hive.DirtyCount;
+            DPRINT("CmHive %wZ already uptodate.\n", &CmHive->FileFullPath);
         }
 
         /* Try the next one */
@@ -139,6 +143,7 @@ CmpLazyFlushDpcRoutine(IN PKDPC Dpc,
                        IN PVOID SystemArgument2)
 {
     /* Check if we should queue the lazy flush worker */
+    DPRINT("Flush pending: %s, Holding lazy flush: %s.\n", CmpLazyFlushPending ? "yes" : "no", CmpHoldLazyFlush ? "yes" : "no");
     if ((!CmpLazyFlushPending) && (!CmpHoldLazyFlush))
     {
         CmpLazyFlushPending = TRUE;
@@ -173,20 +178,27 @@ CmpLazyFlushWorker(IN PVOID Parameter)
     PAGED_CODE();
 
     /* Don't do anything if lazy flushing isn't enabled yet */
-    if (CmpHoldLazyFlush) return;
+    if (CmpHoldLazyFlush)
+    {
+        DPRINT1("Lazy flush held. Bye bye.\n");
+        CmpLazyFlushPending = FALSE;
+        return;
+    }
 
     /* Check if we are forcing a flush */
     ForceFlush = CmpForceForceFlush;
     if (ForceFlush)
     {
+        DPRINT("Forcing flush.\n");
         /* Lock the registry exclusively */
         CmpLockRegistryExclusive();
     }
     else
     {
-        /* Do a normal lock */
-        CmpLockRegistry();
+        DPRINT("Not forcing flush.\n");
+        /* Starve writers before locking */
         InterlockedIncrement(&CmpFlushStarveWriters);
+        CmpLockRegistry();
     }
 
     /* Flush the next hive */
@@ -198,14 +210,21 @@ CmpLazyFlushWorker(IN PVOID Parameter)
     }
 
     /* Check if we have starved writers */
-    if (!ForceFlush) InterlockedDecrement(&CmpFlushStarveWriters);
+    if (!ForceFlush)
+        InterlockedDecrement(&CmpFlushStarveWriters);
 
     /* Not pending anymore, release the registry lock */
     CmpLazyFlushPending = FALSE;
     CmpUnlockRegistry();
 
-    /* Check if we need to flush another hive */
-    if ((MoreWork) || (DirtyCount)) CmpLazyFlush();
+    DPRINT("Lazy flush done. More work to be done: %s. Entries still dirty: %u.\n",
+        MoreWork ? "Yes" : "No", DirtyCount);
+
+    if (MoreWork)
+    {
+        /* Relaunch the flush timer, so the remaining hives get flushed */
+        CmpLazyFlush();
+    }
 }
 
 VOID

reactos/ntoskrnl/config/cmsysini.c

@@ -1949,6 +1949,11 @@ CmpUnlockRegistry(VOID)
         CmpDoFlushAll(TRUE);
         CmpFlushOnLockRelease = FALSE;
     }
+    else
+    {
+        /* Lazy flush the registry */
+        CmpLazyFlush();
+    }
 
     /* Release the lock and leave the critical region */
     ExReleaseResourceLite(&CmpRegistryLock);