Sysadmin Centos 7 with Kernel 4

FYI, Linode.com by default uses custom built 4.6+ Linux kernels on their VPSes. These are truly tested by Linode. This forum on Linode does as well There's plenty of performance improvements especially at TCP level some enabled by default.

ELrepo mainline 4.x kernels you can try but as @bassie stated stability and buggy issues maybe introduced that you'd need to look after yourself.

 

I've used Linode custom 4.x kernels for 2 years now, no probs - probably because Linode tests them to be sure they work with their respective server hardware. But ELrepo haven't really tried as you say default CentOS 7 kernels pretty solid on 3.10. The performance comment was more with CentOS 6 2.6.32 in comparison to Linux 4.x as that's what I had on my mind The import TCP changes where made in CentOS 7 3.10 kernels anyway

It's reason why before CentOS 7 was released, I was so interested in Oracle Linux's UEK 3.8 kernels as it offered something not available in CentOS 2.6.x at the time. Once, CentOS 7 was released with 3.10 kernels, that was no longer the case

 

Yeah if on Linode use their 4.x kernels but else where you try Oracle's UEK Release 4 kernels though i haven't tried them myself for 4.x UEK. So use with care still

• 3.3 Enabling Access to Public Yum Channels
• 3.4 Upgrading Your System

 

@bassie maybe you can clarify instructions at 3.3 Enabling Access to Public Yum Channels

is the example they posted slightly incorrect if you only want UEKR4 you shouldn't need to enable [ol7_latest] ?

So disable [ol7_latest] and enable only [ol7_UEKR4] ?

Code (Text):

[ol7_latest]
name=Oracle Linux $releasever Latest ($basearch)
baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL7/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol7_UEK_latest]
name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)
baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL7/UEK/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

[ol7_UEKR4]
name=Latest Unbreakable Enterprise Kernel Release 4 for Oracle Linux $releasever ($basearch)
baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL7/UEKR4/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1

[ol7_UEKR4_OFED]
name=OFED supporting tool packages for Unbreakable Enterprise Kernel on Oracle Linux 7 ($basearch)
baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL7/UEKR4_OFED/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

Chapter 1 New Features and Changes

 

stick with default unless you know what you're doing