Introduce per-page-color modified page lists

xtoskrnl/includes/mm/colors.hh

@@ -19,6 +19,7 @@ namespace MM
     {
         private:
             STATIC PMMCOLOR_TABLES FreePages[FreePageList + 1];
+            STATIC MMPFNLIST ModifiedPages[MM_PAGING_COLORS];
             STATIC ULONG PagingColors;
             STATIC ULONG PagingColorsMask;
 
@@ -26,9 +27,10 @@ namespace MM
             STATIC XTAPI VOID ComputePageColoring(VOID);
             STATIC XTAPI PMMCOLOR_TABLES GetFreePages(MMPAGELISTS PageList,
                                                       ULONG Color);
-            STATIC XTAPI ULONG GetNextColor();
+            STATIC XTAPI PMMPFNLIST GetModifiedPages(IN ULONG Color);
-            STATIC XTAPI ULONG GetPagingColors();
+            STATIC XTAPI ULONG GetNextColor(VOID);
-            STATIC XTAPI ULONG GetPagingColorsMask();
+            STATIC XTAPI ULONG GetPagingColors(VOID);
+            STATIC XTAPI ULONG GetPagingColorsMask(VOID);
             STATIC XTAPI VOID InitializeColorTables(VOID);
     };
 }

xtoskrnl/mm/colors.cc

@@ -49,6 +49,23 @@ MM::Colors::GetFreePages(MMPAGELISTS PageList,
     return &FreePages[PageList][Color];
 }
 
+/**
+ * Retrieves a pointer to the modified pages list for a specific color.
+ *
+ * @param Color
+ *        Supplies the specific color index.
+ *
+ * @return This routine returns a pointer to the corresponding MMPFNLIST structure.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PMMPFNLIST
+MM::Colors::GetModifiedPages(IN ULONG Color)
+{
+    return &ModifiedPages[Color];
+}
+
 /**
  * Retrieves the next available color for page coloring.
  *
@@ -58,7 +75,7 @@ MM::Colors::GetFreePages(MMPAGELISTS PageList,
  */
 XTAPI
 ULONG
-MM::Colors::GetNextColor()
+MM::Colors::GetNextColor(VOID)
 {
     /* Increment the color counter and wrap it around using the mask */
     return ((++PagingColors) & PagingColorsMask);
@@ -73,7 +90,7 @@ MM::Colors::GetNextColor()
  */
 XTAPI
 ULONG
-MM::Colors::GetPagingColors()
+MM::Colors::GetPagingColors(VOID)
 {
     /* Return the total number of page colors */
     return PagingColors;
@@ -88,7 +105,7 @@ MM::Colors::GetPagingColors()
  */
 XTAPI
 ULONG
-MM::Colors::GetPagingColorsMask()
+MM::Colors::GetPagingColorsMask(VOID)
 {
     /* Return the mask used for page coloring calculations */
     return PagingColorsMask;

xtoskrnl/mm/data.cc

@@ -12,6 +12,9 @@
 /* Array of free page lists segregated by cache color */
 PMMCOLOR_TABLES MM::Colors::FreePages[FreePageList + 1];
 
+/* Array of modified pages segregated by cache color */
+MMPFNLIST MM::Colors::ModifiedPages[MM_PAGING_COLORS];
+
 /* Number of supported page colors */
 ULONG MM::Colors::PagingColors;