id = 1089
title = "when I use memory balloon,the qemu process memory usage is displayed incorrectly"
state = "closed"
created_at = "2022-06-27T11:22:50.833Z"
closed_at = "2022-06-28T05:54:58.932Z"
labels = []
url = "https://gitlab.com/qemu-project/qemu/-/issues/1089"
host-os = "CentOS Linux release 8.2.2004 (Core)"
host-arch = "(x86, ARM, s390x, etc.)"
qemu-version = "QEMU emulator version 5.0.0"
guest-os = "n/a"
guest-arch = "n/a"
description = """My vm memory is 4GB,and use the balloon driver,the balloon value is also 4GB.
I run a soft to consume memory in vm,I can see the memory usage rate is 15% in host. When I stop the soft in vm,the memory of free info in host and vm 
become normal,but use "top -d 3 -Hp $qemu_pid" to query in host,the memory usage rate is also 15%.I need to modify the balloon value in a smaller values,the memory usage rate will reduce. why? 
![image](/uploads/cb904692df89db633825da0609458c1f/image.png)"""
reproduce = """1.run a soft to consume memory in vm,and query top info,the qemu process memory usage:15%


2.query free info in host and vm (reduce)


3.stop sort in vm


4.query free info in host and vm (recover)


5.query top info again (also 15%)



6.modify the balloon value in a smaller (modify the balloon value in a smaller values,the memory usage rate will reduce)"""
additional = "n/a"