Guest shutdown problem with kexec --load ... ; kexec --exec running under Xen on CentOS 7 (x86_64)
cjashfor at linux.vnet.ibm.com
Fri Jul 21 13:27:22 PDT 2017
The platform is a PVHVM guest of CentOS 7 (x86_64) running on a
XenServer (version 6.5 and 7.2 both have the same behavior).
This is the kexec-tools rpm build we are using:
If we run these two commands:
kexec --load /boot/vmlinux-<current kernel> --initrd=/boot/initramfs
<corresponding initramfs for current kernel> --reuse-cmdline
The first line succeeds without errors, but the second one causes the VM
to immediately shutdown, and there's no further output on the console.
We've tried adding a number of different kernel command line options,
such as: debug=1 early_printk=xen loglevel=9
We've also tried blacklisting the PV drivers.
This sequence works fine on KVM, VMware, and also on bare-metal machines.
Is this expected behavior on Xen with CentOS 7.x? We have scoured the
kexec-tools mailing list, googled extensively, and haven't come up with
much help. We've also tried changing various kernel config parameters
related to Xen, but the behavior doesn't change.
Any info, debugging advice, suggestions would be appreciated.
Thanks for your consideration,
IBM Embedded Linux, software engineer
cjashfor at us.ibm.com
More information about the kexec