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, 20 insertions, 0 deletions

diff --git a/src/usr/testcore/kernel/vmmbasetest.H b/src/usr/testcore/kernel/vmmbasetest.H
index 000e400ab..3e1e2fdcd 100644
--- a/src/usr/testcore/kernel/vmmbasetest.H
+++ b/src/usr/testcore/kernel/vmmbasetest.H
@@ -30,6 +30,7 @@
 #include <sys/task.h>
 #include <kernel/console.H>
 #include <arch/ppc.H>
+#include <sys/mm.h>
 
 class VmmBaseTest : public CxxTest::TestSuite
 {
@@ -87,6 +88,25 @@ class VmmBaseTest : public CxxTest::TestSuite
             // @TODO. VMM not ready.
         }
 
+        void testCastOutPages()
+        {
+            //uint64_t vmemaddr = (1ul * 1024 * 1024 * 1024)/2;
+            //uint64_t vmsize = 4ul * 1024 * 500;
+            //printk("Test case: cast out pages\n");
+            //printk("Set up virtual block at %p\n",(void*)vmemaddr);
+            //size_t rc = mm_alloc_block(NULL, // need a msgq?
+            //                           (void*)vmemaddr,
+            //                           vmsize);
+            //if(rc) printk("RC=%ld\n",rc);
+            // touch something on every page
+            //for(uint64_t i = vmemaddr; i < (vmemaddr + vmsize); i += PAGESIZE)
+            //{
+            //    if(*((char *)i) != 'U') printk("Yiks %p is %c\n",(void*)i,*((char *)i));
+            //}
+
+            // see printk buffer for cast out pages
+        }
+
     private:
 
         static void readFromNULL(void* unused)