[jgardou] 63977: [NTOS/MM] - Properly decrement pagetable frame entry share count when unmapping a system-mapped section - Handle the PTE dirty bit

Author: jgardou
Date: Fri Aug 29 09:21:35 2014
New Revision: 63977

URL: http://svn.reactos.org/svn/reactos?rev=63977&view=rev
Log:
[NTOS/MM]
 - Properly decrement pagetable frame entry share count when unmapping a system-mapped section
 - Handle the PTE dirty bit

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/section.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/section.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/section.c?...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/section.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/section.c	[iso-8859-1] Fri Aug 29 09:21:35 2014
@@ -2204,7 +2204,9 @@
             OldIrql = KeAcquireQueuedSpinLock(LockQueuePfnLock);
             ASSERT(((Pfn1->u3.e1.PrototypePte) && (Pfn1->OriginalPte.u.Soft.Prototype)) == 0);

-            /* FIXME: Dirty bit management */
+            /* Mark the page as modified accordingly */
+            if (PteContents.u.Hard.Dirty)
+                Pfn1->u3.e1.Modified = 1;

/* Was the PDE invalid */
             if (PointerPde->u.Long == 0)
@@ -2223,7 +2225,7 @@

/* Dereference the PDE and the PTE */
             Pfn2 = MiGetPfnEntry(PFN_FROM_PTE(PointerPde));
-            //MiDecrementShareCount(Pfn2, PFN_FROM_PTE(PointerPde));
+            MiDecrementShareCount(Pfn2, PFN_FROM_PTE(PointerPde));
             DBG_UNREFERENCED_LOCAL_VARIABLE(Pfn2);
             MiDecrementShareCount(Pfn1, PFN_FROM_PTE(&PteContents));