[CentOS-devel] CentOS 7 Public QA: CentOSPlus kernel available for testing

[Anssi Johansson]

25.6.2014 23.24, Akemi Yagi kirjoitti:
> The first version of the centosplus kernel for 7 is now available for
> testing. The kernel version is 3.10.0-123.el7 (GA kernel).  You can
> download it from:
>
> [...]
>
> Feedback greatly appreciated. Happy testing!

I installed the plus kernel on:
- VirtualBox VM running in BIOS mode
- VirtualBox VM running in UEFI mode
- Dell R320 running in UEFI mode
- Acer Aspire XC-105 running in UEFI mode

Some remarks:
* Ajusting DEFAULTKERNEL in /etc/sysconfig/kernel to kernel-plus made 
the plus kernel as the default kernel, as expected

* I saw a slightly confusing menu entry in grub.conf after installing 
the plus kernel:

menuentry 'CentOS Linux (3.10.0-123.el7.centos.plus.x86_64) 7 (Broken)' 
--class centos --class gnu-linux --class gnu --class os --unrestricted 
$menuentry_id_option 
'gnulinux-3.10.0-123.1.2.el7.x86_64-advanced-2b358b21-34b5-492e-b296-af1d4fbdb5f6'

Apparently the running kernel version affects how the menu entry is 
constructed. I was running 3.10.0-123.1.2 when I ran "yum install 
kernel-plus". The latter $menuentry_id_option doesn't seem to be visible 
anywhere, if you don't have a look at grub.conf by yourself.

* "modprobe reiserfs" worked and it brought "reiserfs" to /proc/filesystems

* The kernel-plus packages devel, abi-whitelists, doc, headers, tools, 
tools-libs, tools-libs-devel, perf, python-perf were installable, 
although kernel-plus-tools(-libs) and kernel-tools(-libs) can't coexist 
on the same box, and the non-plus tools packages had to be removed 
first. This is reportedly intentional.

* Removing the plus kernel worked, but I got a warning about missing 
files for modules.softdep and modules.devname. This message is 
reportedly harmless and can be ignored.

* Acer supports UEFI secure boot, and the plus kernel booted with it 
enabled. However, the system was running in 'Setup' mode, so it's 
possible that secure boot was not really 'fully enabled' at that stage.

* The menu entries in grub look a bit different as compared to the stock 
kernels:

CentOS Linux (3.1.0-123.el7.centos.plus.x86_64) 7 (Broken)
CentOS Linux, with Linux 3.10.0-123.1.2.el7.x86_64
CentOS Linux, with Linux 0-rescue-...