内核合入Lustre补丁

准备内核源码

1. 创建目录结构。

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   $ cd $HOME $ mkdir -p kernel/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS} $ cd kernel $ echo '%_topdir %(echo $HOME)/kernel/rpmbuild' > ~/.rpmmacros

2. 安装内核源码。

   1	$ rpm -ivh https://vault.centos.org/8.0.1905/BaseOS/Source/SPackages/kernel-4.18.0-80.11.2.el8_0.src.rpm

3. 用rpmbuild准备内核源码。

   1 2	$ cd ~/kernel/rpmbuild $ rpmbuild -bp --target=`uname -m` ./SPECS/kernel.spec

   结果输出如下。

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   ... Processed config files are in /home/build/kernel/rpmbuild/BUILD/kernel-4.18.0-80.11.2.el8_0/linux-4.18.0-80.11.2.el8.aarch64/configs + cd .. + find . '(' -name '*.orig' -o -name '*~' ')' -exec rm -f '{}' ';' + find . -name .gitignore -exec rm -f '{}' ';' + cd .. + exit 0

4. 复制内核文件到lustre tree。

   1	cp ~/kernel/rpmbuild/BUILD/kernel-4.18.0-80.11.2.el8_0/linux-4.18.0-80.11.2.el8.aarch64/configs/kernel-4.18.0-aarch64.config ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-4.18.0-4.18-rhel8-aarch64.config

5. 编辑内核文件。

   1	vim ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-4.18.0-4.18-rhel8-aarch64.config

   找到“# IO Schedulers”，在下面插入以下内容。

   1 2	CONFIG_IOSCHED_DEADLINE=y CONFIG_DEFAULT_IOSCHED="deadline"

合入Lustre补丁

1. 将所有补丁聚集到一个文件中。

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   $ cd ~ $ rm -f ~/lustre-kernel-aarch64-lustre.patch #Note:没有这个文件就不用 $ cd ~/lustre-release/lustre/kernel_patches/series $ for patch in $(<"4.18-rhel8.series"); do \ patch_file="$HOME/lustre-release/lustre/kernel_patches/patches/${patch}"; \ cat "${patch_file}" >> "$HOME/lustre-kernel-aarch64-lustre.patch"; \ done

2. 复制内核补丁build tree。

   1	cp ~/lustre-kernel-aarch64-lustre.patch ~/kernel/rpmbuild/SOURCES/patch-4.18.0-lustre.patch

3. 编辑文件“~/kernel/rpmbuild/SPECS/kernel.spec”。

   1	vim ~/kernel/rpmbuild/SPECS/kernel.spec

   1. 找到“find $RPM_BUILD_ROOT/lib/modules/$KernelVer”，在下面插入如下内容。

      1	cp -a fs/ext4/* $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/fs/ext4

   2. 找到“# empty final patch to facilitate testing of kernel patches”，在下面插入如下内容。

      1 2	# adds Lustre patches Patch99995: patch-%{version}-lustre.patch

   3. 找到“ApplyOptionalPatch linux-kernel-test.patch”，在下面插入如下内容。

      1 2	# lustre patch ApplyOptionalPatch patch-%{version}-lustre.patch

4. 覆盖内核配置文件“~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-4.18.0-4.18-rhel8-aarch64.config”。

   1 2	$ echo '# arm64' > ~/kernel/rpmbuild/SOURCES/kernel-4.18.0-aarch64.config $ cat ~/lustre-release/lustre/kernel_patches/kernel_configs/kernel-4.18.0-4.18-rhel8-aarch64.config >> ~/kernel/rpmbuild/SOURCES/kernel-4.18.0-aarch64.config

生成内核RPM包

用rpmbuild构建内核RPM包。

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$ cd ~/kernel/rpmbuild
$ buildid="_lustre" # Note: change to any string that identify your work
$ rpmbuild -ba --with firmware --target aarch64 --with baseonly \
--without kabichk --define "buildid ${buildid}" \
~/kernel/rpmbuild/SPECS/kernel.spec

构建成功后返回以下结果。

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Checking for unpackaged file(s): /usr/lib/rpm/check-files /home/build/kernel/rpmbuild/BUILDROOT/kernel-4.18.0-80.11.2.el8_lustre.aarch64
Wrote: /home/build/kernel/rpmbuild/SRPMS/kernel-4.18.0-80.11.2.el8_lustre.src.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-headers-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-cross-headers-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-debuginfo-common-aarch64-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/perf-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/perf-debuginfo-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/python3-perf-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/python3-perf-debuginfo-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-tools-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-tools-libs-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-tools-libs-devel-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-tools-debuginfo-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/bpftool-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/bpftool-debuginfo-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-core-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-devel-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-modules-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-modules-extra-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Wrote: /home/build/kernel/rpmbuild/RPMS/aarch64/kernel-debuginfo-4.18.0-80.11.2.el8_lustre.aarch64.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.SqV3vr
+ umask 022
+ cd /home/build/kernel/rpmbuild/BUILD
+ cd kernel-4.18.0-80.11.2.el8_0
+ rm -rf /home/build/kernel/rpmbuild/BUILDROOT/kernel-4.18.0-80.11.2.el8_lustre.aarch64
+ exit 0

安装内核

1. 切换至root用户，安装内核RPM包。

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   $ su root # cd ~/kernel/rpmbuild/RPMS/aarch64/ # rpm -Uvh kernel-core-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-headers-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-modules-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-modules-extra-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-devel-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-tools-4.18.0-80.11.2.el8_lustre.aarch64.rpm kernel-tools-libs-4.18.0-80.11.2.el8_lustre.aarch64.rpm

2. 重启系统。

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   # reboot

3. 查看内核版本。

   1	# uname -r

   1	4.18.0-80.11.2.el8_lustre.aarch64