Modify calculating free memory method

NanXiao · Apr 27, 2018 · cc73078 · cc73078
1 parent 36e44e5
commit cc73078
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diff --git a/README.md b/README.md
@@ -1,14 +1,14 @@
-# free
-[free](https://linux.die.net/man/1/free) command for `OpenBSD`:
-
-	# ./free
-	                     total              used              free
-	Mem:                 4032M               28M             4004M
-	Swap:                   0B                0B                0B
-P.S, I use [uvmexp.active](https://github.com/openbsd/src/blob/dbdab68da3b0b11846f6b023c8e069c40aa1fd71/sys/uvm/uvmexp.h#L50) to denote "`used`" memory, not "[uvmexp.npages](https://github.com/openbsd/src/blob/dbdab68da3b0b11846f6b023c8e069c40aa1fd71/sys/uvm/uvmexp.h#L48) - [uvmexp.free](https://github.com/openbsd/src/blob/dbdab68da3b0b11846f6b023c8e069c40aa1fd71/sys/uvm/uvmexp.h#L49)".
-## Usage  
-
-	# git clone https://github.com/NanXiao/free.git
-	# cd free
-	# make
+# free
+[free](https://linux.die.net/man/1/free) command for `OpenBSD`:
+
+	# ./free
+	                     total              used              free
+	Mem:                 4032M               28M             4004M
+	Swap:                   0B                0B                0B
+
+## Usage  
+
+	# git clone https://github.com/NanXiao/free.git
+	# cd free
+	# make
 	# ./free
diff --git a/free.c b/free.c
@@ -83,8 +83,8 @@ int main(int argc, char **argv)
         err(1, "pledge");
     }
 
-    used_mem = (int64_t)uvm.pagesize * uvm.active;
-    free_mem = phy_mem - used_mem;
+    free_mem = (int64_t)uvm.pagesize * uvm.free;
+    used_mem = phy_mem - free_mem;
 
     swap = (int64_t)uvm.pagesize * uvm.swpages;
     used_swap = (int64_t)uvm.pagesize * uvm.swpginuse;