Help Fix Centos Kernel Rpm Error Rebuilding Kernel

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    You should review these troubleshooting tips if you receive an error message about rebuilding Centos Kernel RPM on your computer.

    rebuild centos kernel rpm

    We have the largest RPM repository of NGINX and VMOD resource packages for Varnish. If you want to install NGINX, Varnish and many other useful performance/security technologies with yum culture updates, this repository is for you.
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    Native And RPM Optimization

    There is no guarantee that every server and workstation will run on the same processor. For this reason, RPM packages are usually sold for a specific architecture, which is no doubt a generic term for large hardware common with CPU instructions.packages

    Because RPMs are designed to work with a wide range of processors, they often do not come with all possible processor optimizations for the computer they will be installed on. They don’t benefit from built-in CPU optimization.

    Software compiled with native CPU optimizations will produce binary files exclusively optimized for unique hardware.binary
    These files can lead to verya big 15-30% increase in performance on some workloads.

    So it’s great to build software packages with native optimization, but consistency and/or repeatability is often forgotten.

    You don’t have to abandon the RPM package if you decide to super-optimize your server or workstation with the built-in optimization engine.
    In addition, you can significantly reduce the time of reinstalling “native software”, if it is, of course, how a very rpm package was created. Well
    and of course the downside of being able to distribute your own package to a fleet of machines with the same processor is great.

    How To Buy Native RPM Here Kernel

    So I present this method for compiling an awesome RPM package with custom CPU optimizations for the new CentOS/RHEL core, the Linux kernel.

    It’s like writing scripts so you can start at any time and save time.
    The script must be run by a regular user with sudo privileges. Also applies, unless otherwise noted, you must build all your own packages.core on the device with the same processor on which they will be installed.

    sudo dnf -y deploy dnf install replacesudo mock usermod -a -G -p mock $USERmkdir ~/kernel-nativecd get ~/kernel-nativednf --source Kernelrpm2cpio kernel *.src.rpm | cpio-idmvRPM_OPT_FLAGS=`echo $(rpm %optflags) | -e '[email protected]@[email protected]' zed | sed '[email protected]@[email protected]' | sed '$RPM_OPT_FLAGS' '[email protected][email protected][email protected]'`replace "$RPM_OPT_FLAGS" -- kernel.specReplace '# define buildid .local' with '% buildid define .native' -- kernel.specmock -r --no-cleanup-after epel-8-x86_64 --no-clean --sources= --spec=$spec. --resultdir=.-r --buildsrpmmock epel-8-x86_64 --no-cleanup-after --rebuild --no-clean --resultdir=. *.src.rpmsudo dnf install Kernel-4*.native.*x86_64.rpm Kernel-Core-4*.native.*x86_64.rpm Kernel-Module-4*.native.*x86_64.rpm

    First, extracts which is the latest available RPM kernel source from the market, extracts it and. The RPM source package contains the best kernel sources of all RedHat patches.
    This ensures that the package received is equivalent and compatible with the correct CentOS/RHEL package. We are

    Next, let’s fix the main SPEC file by replacing the compiler versions with a higher optimization step -O3 and adjusting the optimization to work with the processor we were working with . native: - mtune=native.
    Basically, as you can see, we are changing $RPM_OPT_FLAGS to:

    rebuild centos kernel rpm

    -O3 -march=native -g -direction -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/ -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=native -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection

    The last line ensures that most of these packages are installed afterwards.
    Packages ending in an RPM package are safe in ~/kernel-native for distribution to multiple other computers with the same processor, or subsequent reinstallation.


    Run uname -a and also notice native in the output:

    la Linux four fast name hosts.18.0-193.6.3.el8.native.x86_64 SMP #1 Sat around Jun 20 16:25:47 MSK X86_64 2020 x86_64 GNU/Linux

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    Congratulations x86_64. Your core is using the processor to reach its full potential.


    Creating core discounts is not an easy task. Be patient, drink coffee 🙂

    Indeed, since our Holiday RPMs are tied to specific processor, they may or may not be busy on other computers that come with the processor

    You may want to lock down a pre-yum kernel version to prevent upgrading to a non-native kernel altogether. This is best associated with a workflow configuration to restore an automatic native package.
    So you can get the best of both worlds: the original packaging and the continuity of the current one.

    Without such a workflow, changes, updates, manuals in cd ~/kernel-native, pull the old package out of the kernel and restart some script.

    Did You Know?

    Kernel packages are often unique in that you usually have multiple versions of some of them, even if they share the same base name.
    Indeed, it is possible to avoid any type of kernel with errors due to loading time.

    To specify the number of newer kernels to keep during kernel installation, you can use

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