[ion] 25656: - Merge Arty's Mm Page Referencing patch. I was able to complete first-stage setup (albeit only on the second try) and booting to second stage (after three tries). There are still freelist.c bugchecks but this patch is defintely a step in the right direction.

Author: ion
Date: Sun Jan 28 19:23:52 2007
New Revision: 25656

URL: http://svn.reactos.org/svn/reactos?rev=25656&view=rev
Log:
- Merge Arty's Mm Page Referencing patch. I was able to complete first-stage setup (albeit only on the second try) and booting to second stage (after three tries). There are still freelist.c bugchecks but this patch is defintely a step in the right direction.

Modified:
    trunk/reactos/ntoskrnl/mm/freelist.c

Modified: trunk/reactos/ntoskrnl/mm/freelist.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/freelist.c?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/freelist.c (original)
+++ trunk/reactos/ntoskrnl/mm/freelist.c Sun Jan 28 19:23:52 2007
@@ -479,7 +479,9 @@
                MmPageArray[j].Flags.Type = MM_PHYSICAL_PAGE_USED;
                MmPageArray[j].Flags.Zero = 0;
                MmPageArray[j].Flags.Consumer = MC_NPPOOL;
-               MmPageArray[j].ReferenceCount = 1;
+	       /* Reference count 2, because we're having ReferenceCount track
+		  MapCount as well. */
+               MmPageArray[j].ReferenceCount = 2;
                MmPageArray[j].MapCount = 1;
                InsertTailList(&UsedPageListHeads[MC_NPPOOL],
                               &MmPageArray[j].ListEntry);
@@ -519,7 +521,7 @@
          MmPageArray[i].Flags.Type = MM_PHYSICAL_PAGE_USED;
          MmPageArray[i].Flags.Zero = 0;
          MmPageArray[i].Flags.Consumer = MC_NPPOOL;
-         MmPageArray[i].ReferenceCount = 1;
+         MmPageArray[i].ReferenceCount = 2;
          MmPageArray[i].MapCount = 1;
          InsertTailList(&UsedPageListHeads[MC_NPPOOL],
                         &MmPageArray[i].ListEntry);
@@ -588,6 +590,7 @@
          KEBUGCHECK(0);
       }
       MmPageArray[Pfn].MapCount++;
+      MmPageArray[Pfn].ReferenceCount++;
       KeReleaseSpinLock(&PageListLock, oldIrql);
    }
 }
@@ -612,6 +615,7 @@
          KEBUGCHECK(0);
       }
       MmPageArray[Pfn].MapCount--;
+      MmPageArray[Pfn].ReferenceCount--;
       KeReleaseSpinLock(&PageListLock, oldIrql);
    }
 }