Re: [Qemu-devel] [PATCH] memory: reduce heap Rss size around 3M

[Philippe Mathieu-Daudé]

On 03/08/2017 12:11 PM, Yang Zhong wrote:

Since cpu-memory and memory have same address space,one malloced
memory is enough. This patch will skip memory malloc for memory
address space,which will reduce around 3M physical memory in heap.

Signed-off-by: Yang Zhong <yang.zh...@intel.com>

Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>

---
 memory.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/memory.c b/memory.c
index 284894b..799ca4c 100644
--- a/memory.c
+++ b/memory.c
@@ -2422,8 +2422,10 @@ AddressSpace *address_space_init_shareable(MemoryRegion 
*root, const char *name)
     AddressSpace *as;

     QTAILQ_FOREACH(as, &address_spaces, address_spaces_link) {
-        if (root == as->root && as->malloced) {
-            as->ref_count++;
+        if (root == as->root) {
+            if (as->malloced) {
+                as->ref_count++;
+            }
             return as;
         }
     }