[xen stable-4.13] tools/xentop: Fix calculation of used memory

[patchbot@xxxxxxx]

commit e04b94a54fd550636600f8d32f6076c6167dab52
Author:     Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
AuthorDate: Wed Feb 19 21:31:30 2020 +0100
Commit:     Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
CommitDate: Tue May 5 15:10:55 2020 +0100

    tools/xentop: Fix calculation of used memory
    
    Used memory should be calculated by subtracting free memory from total
    memory.
    
    Fixes: c588c002cc1 ("tools: remove tmem code and commands")
    Signed-off-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
    Acked-by: Wei Liu <wl@xxxxxxx>
    (cherry picked from commit 4b5b431edd984b26f43b3efc7de465f3560a949e)
---
 tools/xenstat/xentop/xentop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/xenstat/xentop/xentop.c b/tools/xenstat/xentop/xentop.c
index af11ebfbf7..f9f4dfb453 100644
--- a/tools/xenstat/xentop/xentop.c
+++ b/tools/xenstat/xentop/xentop.c
@@ -969,7 +969,7 @@ void do_summary(void)
              "%u crashed, %u dying, %u shutdown \n",
              num_domains, run, block, pause, crash, dying, shutdown);
 
-       used = xenstat_node_tot_mem(cur_node);
+       used = xenstat_node_tot_mem(cur_node) - xenstat_node_free_mem(cur_node);
        freeable_mb = 0;
 
        /* Dump node memory and cpu information */
--
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