Mechanism to detect low memory and cast out older page

Change-Id: Icce8e01f3d1cd2942f2b9ff802993da0441535ee
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/344
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/kernel/ptmgr.C b/src/kernel/ptmgr.C
index 0feffb7e6..92d211888 100644
--- a/src/kernel/ptmgr.C
+++ b/src/kernel/ptmgr.C
@@ -251,6 +251,10 @@ void PageTableManager::printPT( void )
     Singleton<PageTableManager>::instance()._printPT();
 }
 
+void PageTableManager::flush( void )
+{
+    Singleton<PageTableManager>::instance()._flush();
+}
 
 /********************
  Private/Protected Methods
@@ -1102,3 +1106,21 @@ void PageTableManager::pushUsageStats( PageTableEntry* i_pte )
     uint64_t va = getVirtAddrFromPTE(i_pte);
     SegmentManager::updateRefCount( va, stats );
 }
+
+void PageTableManager::_flush( void )
+{
+    if( ivTABLE )
+    {
+        return;
+    }
+
+    PageTableEntry* pte = (PageTableEntry*)getAddress();
+    uint64_t num_ptes = getSize() / sizeof(PageTableEntry);
+    for (uint64_t i = 0; i < num_ptes; ++i)
+    {
+        updateLRU( pte );
+        pushUsageStats ( pte );
+        ++pte;
+    }
+}
+