Downgrade default kernel in RHEL7.3
In rhel 7.3 , Is it recommended or feasible to downgrade default kernel-3.10.0-514.21.2.el7.x86_64 version to older kernel-3.10.0-514.el7.x86_64 version??
Responses
Nidhi,
There is no direct answer to this question. It would finally depends on your requirements. If there is a need or my applications demands (aka compatible) that I need to use only RHEL7.2 kernel version which is "3.10.0-327" then I'd certainly need to tune my system to that, If this is a new setup then I'd trigger the task of installing a fresh RHEL7.2 instead of downgrading RHEL7.4/7.3 kernel, saying so, you can just install "3.10.0-327" kernel and make it default one to boot up which would serve the purpose, however, if there is any library mismatch that your apps needs ( older one as compared with installed ones) then you may have to struggle a bit to get those packages (either downgraded or installing those). So, careful planning and steps needs to taken at this stage.
Red Hat
Guru
7257 points
You can do it, but I'd question why.
The kernel ABI and API is guaranteed stable within a minor release. This means anything which works on 3.10.0-514.el7 should work exactly the same on 3.10.0-514.21.2.el7.
Guru
9710 points
Hi Nidhi,
"Is it recommended to downgrade default kernel ?" Exactly the opposite is true, you should always use the latest stable kernel.
New kernel versions provide you with bug fixes, drivers and performance improvements, as well as security enhancements, so
unless there are no specific major issues you experience with the newest kernel, you shouldn't downgrade to an older release.
Regards,
Christian
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