[openEuler 20.03 LTS SP2/x86] ltp用例cpuhotplug04执行失败

【环境信息】
系统：虚拟机
内存：4g
cpu：4核
OS版本：openEuler 20.03 (LTS-SP2)
kernel版本:4.19.90-2107.4.0.0097.oe1.x86
发布源：http://121.36.84.172/repo.openeuler.org/openEuler-20.03-LTS-SP2/update_20210721
【复现步骤】
./runltp -s cpuhotplug04

【预期结果】
用例执行成功，没有错误步骤
【实际结果】
<<<test_start>>>
tag=cpuhotplug04 stime=1627088123
cmdline="cpuhotplug04.sh -l 1"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
Name: cpuhotplug04
Date: Sat Jul 24 08:55:23 CST 2021
Desc: Does it prevent us from offlining the last CPU?

/opt/ltp/testcases/bin/cpuhotplug_hotplug.sh: line 99: echo: write error: No space left on device
cpuhotplug04 1 TFAIL: Could not offline cpu85

【结果截图】
输入图片说明

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#I3Q7WG:[openEuler 20.03-SP1] update 20210427 cpuhotplug04 用例失败

GVP openEuler / kernel

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GVPopenEuler / kernel

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