[mbosma] 23300: Merge 23213

Author: mbosma
Date: Wed Jul 26 13:26:12 2006
New Revision: 23300

URL: http://svn.reactos.org/svn/reactos?rev=23300&view=rev
Log:
Merge 23213

Modified:
    branches/cache_manager_rewrite/mm/mminit.c
    branches/cache_manager_rewrite/mm/process.c

Modified: branches/cache_manager_rewrite/mm/mminit.c
URL:
http://svn.reactos.org/svn/reactos/branches/cache_manager_rewrite/mm/mminit…
==============================================================================
--- branches/cache_manager_rewrite/mm/mminit.c (original)
+++ branches/cache_manager_rewrite/mm/mminit.c Wed Jul 26 13:26:12 2006
@@ -29,7 +29,7 @@
 
 
 static BOOLEAN IsThisAnNtAsSystem = FALSE;
-static MM_SYSTEM_SIZE MmSystemSize = MmSmallSystem;
+MM_SYSTEM_SIZE MmSystemSize = MmSmallSystem;
 
 PHYSICAL_ADDRESS MmSharedDataPagePhysicalAddress;
 

Modified: branches/cache_manager_rewrite/mm/process.c
URL:
http://svn.reactos.org/svn/reactos/branches/cache_manager_rewrite/mm/proces…
==============================================================================
--- branches/cache_manager_rewrite/mm/process.c (original)
+++ branches/cache_manager_rewrite/mm/process.c Wed Jul 26 13:26:12 2006
@@ -17,11 +17,35 @@
 extern ULONG NtMinorVersion;
 extern ULONG NtOSCSDVersion;
 extern ULONG NtGlobalFlag;
+extern MM_SYSTEM_SIZE MmSystemSize;
 
 #define MM_HIGHEST_VAD_ADDRESS \
     (PVOID)((ULONG_PTR)MM_HIGHEST_USER_ADDRESS - (16 * PAGE_SIZE))
 
 /* FUNCTIONS *****************************************************************/
+
+NTSTATUS
+NTAPI
+MmSetMemoryPriorityProcess(IN PEPROCESS Process,
+                           IN UCHAR MemoryPriority)
+{
+    UCHAR OldPriority;
+
+    /* Check if we have less then 16MB of Physical Memory */
+    if ((MmSystemSize == MmSmallSystem) &&
+        (MmStats.NrTotalPages < ((15 * 1024 * 1024) / PAGE_SIZE)))
+    {
+        /* Always use background priority */
+        MemoryPriority = 0;
+    }
+
+    /* Save the old priority and update it */
+    OldPriority = Process->Vm.Flags.MemoryPriority;
+    Process->Vm.Flags.MemoryPriority = MemoryPriority;
+
+    /* Return the old priority */
+    return OldPriority;
+}
 
 LCID
 NTAPI