Changeset 33507 in vbox for trunk/src

Timestamp:

Oct 27, 2010 1:31:39 PM (14 years ago)

Author:

vboxsync

Message:

Fail large page allocation if there's less than 2 GB memory free on the host.

File:

• trunk/src/VBox/VMM/PGMPhys.cpp (modified) (3 diffs)

trunk/src/VBox/VMM/PGMPhys.cpp

@@ -39 +39 @@
 #include <iprt/thread.h>
 #include <iprt/string.h>
+#include <iprt/system.h>
 
 
@@ -3844 +3845 @@
 VMMR3DECL(int) PGMR3PhysAllocateLargeHandyPage(PVM pVM, RTGCPHYS GCPhys)
 {
+#ifdef PGM_WITH_LARGE_PAGES
+    uint64_t cbAvailableMem;
+
+    if (    RTSystemQueryAvailableRam(&cbAvailableMem) == VINF_SUCCESS
+        &&  cbAvailableMem < (UINT64_C(2) * _1G))
+    {
+        /** Too little free RAM left; don't bother as the host might try to move memory around, which is very expensive. */
+        return VINF_EM_NO_MEMORY;
+    }
+
     pgmLock(pVM);
 
@@ -3918 +3929 @@
     pgmUnlock(pVM);
     return rc;
+#else
+    return VERR_NOT_IMPLEMENTED;
+#endif /* PGM_WITH_LARGE_PAGES */
 }