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Compiling Bcache

Preparing the Compilation Environment

  1. Check that the ISO image CentOS-7-aarch64-Everything-1810.iso is used for the installation.
  2. Check the OS version.
    uname -a
    An example output of the OS version:
    Linux localhost.localdomain 4.14.0-115.10.1.el7a.aarch64 #1 SMP Thu Nov 26 14:15:20 CST 2020 aarch64 aarch64 aarch64 GNU/Linux
  3. Check the GCC version.
    gcc -v

    The recommended GCC version is GCC 4.8.5 (the default version for CentOS 7.6).

    An example output of the GCC version:
    Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-redhat-linux/4.8.5/lto-wrapper
Target: aarch64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-aarch64-redhat-linux/cloog-install --enable-gnu-indirect-function --build=aarch64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC)
  4. Check that the kernel header file has been installed.
    ls /usr/src/kernels/$(uname -r)
    An example output of the header file information:
    arch  block  certs  crypto  drivers  firmware  fs  include  init  ipc  Kconfig  kernel  lib  Makefile  mm  Module.symvers  net  samples  scripts  security  sound  System.map  tools  usr  virt

Compiling the Source Code

  1. Download the source code of the smart prefetch bcache from the following link:
  2. Install the kernel development software package.
    yum install kernel-devel-4.14.0-115.el7a.0.1
  3. Perform the compilation in the source code directory drivers/md/bcache.
    make -C /lib/modules/4.14.0-115.el7a.0.1.aarch64/build M=$(pwd)
  4. Obtain the generated file bcache.ko.