hello,
when C7.4 was released in early August 2017. The above bug report was
where I learned about the pv domU kernel limitation.
The CentosPlus kernel was patched soon after and that gave us a workaround. Most frustrating to me was the flaw in 7.4 bootable media and also the pxeboot images. This meant we couldn't boot into a xen pv install using the `official` media ISO's.
I went ahead to build a new pxeboot pair based on the CentosPlus repaired kernel and then I remastered the minimal ISO using those tools. Below I show my fixed pxeboot pair.
results]$ ls -al images/pxeboot/
total 110972
drwxr-xr-x 2 root root 4096 Sep 21 19:12 .
drwxr-xr-x 3 root root 4096 Sep 21 19:12 ..
-rw-r--r-- 2 root root 50955588 Sep 21 19:10 initrd.img
-rw-r--r-- 2 root root 56606612 Sep 21 19:12 upgrade.img
-rwxr-xr-x 2 root root 5928336 Sep 12 2017 vmlinuz
[mockbuild@c7min:~/results]$ file images/pxeboot/vmlinuz
images/pxeboot/vmlinuz: Linux kernel x86 boot executable bzImage, version 3.10.0-693.2.2.el7.centos.plus.x86_64 (
mockbuild@xxxxxxxxxxxxxx, RO-rootFS, swap_dev 0x5, Normal VGA
Good news for us/you is this pv kernel limitation is a singular problem limited to the default C7.4 kernel and you have many options to workaround. Not only the CentosPlus kernel works to boot your domU, but also the elrepo kernel-LT and kernel-ML.
PryMar56
##xen-packaging on Freenode
With the changes in CentOS 7 not allowing for PV anymore, unless they fix it as the Red Hat log indicates they may, in reading I’m hearing that PVHVM is the way to go offering more advantages.
Currently I am using the kernel Linux
h1.hldns.com 4.9.75-29.el7.x86_64 #1 SMP Fri Jan 5 19:42:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux and the Xen 4.6.6-10.el7 packages
Does anyone have a working config file for CentOS 7 I can try?
Steffan A. Cline
602-793-0014
_______________________________________________
Xen-users mailing list
