Add option to use file backed guest memory
Port qemu-kvm's -mem-path and -mem-prealloc options. These are useful
for backing guest memory with huge pages via hugetlbfs.
Signed-off-by: Marcelo Tosatti <[email protected]>
CC: john cooper <[email protected]>
diff --git a/qemu-options.hx b/qemu-options.hx
index 7daa246..fd50add 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -314,6 +314,22 @@
gigabytes respectively.
ETEXI
+DEF("mem-path", HAS_ARG, QEMU_OPTION_mempath,
+ "-mem-path FILE provide backing storage for guest RAM\n")
+STEXI
+@item -mem-path @var{path}
+Allocate guest RAM from a temporarily created file in @var{path}.
+ETEXI
+
+#ifdef MAP_POPULATE
+DEF("mem-prealloc", 0, QEMU_OPTION_mem_prealloc,
+ "-mem-prealloc preallocate guest memory (use with -mem-path)\n")
+STEXI
+@item -mem-prealloc
+Preallocate memory when using -mem-path.
+ETEXI
+#endif
+
DEF("k", HAS_ARG, QEMU_OPTION_k,
"-k language use keyboard layout (for example 'fr' for French)\n")
STEXI
