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Posted Jun 26, 2013 15:56 UTC (Wed) by hughesjr (guest, #29949)
Remember that the LTS kernel gets important updates (and driver module updates, etc.) rolled into it from the current kernel tree by kernel.org. If you read the changelogs, it has many items rolled in from the current kernel tree.
A lot of thought was given to how this project could best provide Xen-4.x comparability and CentOS compatibility while also providing Security updates and having a kernel tree be active for enterprise level time frames (multiple years and not a 6 month cycle).
This seemed to us to be the method that provides the best option for all of those concerns ... specifically for the Dom0 kernel used for the hypervisor.
If people also want to use it for other things, then they can test it and see if it also works for those functions, but it was specifically designed to be used only for the Dom0 hypervisor instance.
Regardless of how people use it, it will be maintained for an extended period and it will be secure. The Linux Foundation thought enough of this 3.4 LTS kernel tree to make it the base of the LTSI kernel program that they run. One of the main reasons we also chose to use it.
Posted Jun 26, 2013 16:06 UTC (Wed) by hughesjr (guest, #29949)
This Xen4CentOS project is making use of the Long Term Stable Tree that is pictured on the above LTSI linked page, not the LTSI kernel with changes for embedded devices rolled in.
As you can see, the "Kernel.org Greg K-H 3.4 LTS Kernel tree" (what the Xen4entOS project uses) gets changes rolled in from the main line kernel ... and that tree also gets exported at certain times to become the "LTS Industry Tree" kernel.
Posted Jun 26, 2013 21:16 UTC (Wed) by pbonzini (subscriber, #60935)
No, the RHEL kernel is sometimes ahead of 3.4 in terms of _features_. For example, https://access.redhat.com/site/documentation/en-US/Red_Ha... mentions perf being updated to 3.7. Yes, this kernel is used only for dom0, but still it is not comparable with the RHEL kernel, and also not ABI-compatible.
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