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[BUG] Xen causes a host hang by using xen-hptool cpu-offline
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Gao, Ruifeng" <ruifeng.gao@xxxxxxxxx>
- Date: Wed, 27 Jul 2022 01:19:46 +0000
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- Thread-topic: [BUG] Xen causes a host hang by using xen-hptool cpu-offline
Problem Description:
Trying to execute "/usr/local/sbin/xen-hptool cpu-offline <cpuid>", the host
will hang immediately.
Version-Release and System Details:
Platform: Ice Lake Server
Host OS: Red Hat Enterprise Linux 8.3 (Ootpa)
Kernel: 5.19.0-rc6
HW: Intel(R) Xeon(R) Gold 6336Y CPU @ 2.40GHz
Xen Version: 4.17-unstable(ab2977b027-dirty)
Reproduce Steps:
1. Boot from Xen and check the information:
[root@icx-2s1 ~]# xl info
host : icx-2s1
release : 5.19.0-rc6
xen_version : 4.17-unstable
xen_caps : xen-3.0-x86_64 hvm-3.0-x86_32 hvm-3.0-x86_32p
hvm-3.0-x86_64
platform_params : virt_start=0xffff800000000000
xen_changeset : Thu Jul 14 19:45:36 2022 +0100 git:ab2977b027-dirty
2. Execute the cpu-offline command, here cpuid is 48 as an example:
[root@icx-2s1 ~]# /usr/local/sbin/xen-hptool cpu-offline 48
Actual Results:
The host will hang immediately.
Expected Results:
The selected CPUs will be offline after executing the "xen-hptool cpu-offline"
command.
Additional Info:
On previous Xen commit 4.17-unstable(58ce5b6c-dirty), after executing the same
command, the host works normally.
Attachment:
icx-2s1.log
Description: icx-2s1.log
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