Qustion about the LINUX_VERSION argument

[infdahai]

I want to learn zfs so I compile and build it in WSL distro. But I exec the modprobe zfs failed.

The issue information is throwed in microsoft/WSL#10128. In short, I find the build and extra dir depends on the LINUX_VERSION argument.

The kernel.m4 generate this argument. But I don't really understand the configuration.

LINUX_VERSION=${kernsrcver}

And the makefile file shows this.

LINUX = /usr/src/linux-headers-5.15.0-72-generic
LINUX_OBJ = /usr/src/linux-headers-5.15.0-72-generic
LINUX_SYMBOLS = Module.symvers
LINUX_VERSION = 5.15.0-72-generic

The log from the command ofmake install is shown below.

make -C /usr/src/linux-headers-5.15.0-72-generic M="$PWD" modules_install \
	INSTALL_MOD_PATH= \
	INSTALL_MOD_DIR=extra \
	KERNELRELEASE=5.15.0-72-generic
make[2]: Entering directory '/usr/src/linux-headers-5.15.0-72-generic'
  INSTALL /lib/modules/5.15.0-72-generic/extra/spl.ko
  SIGN    /lib/modules/5.15.0-72-generic/extra/spl.ko
  INSTALL /lib/modules/5.15.0-72-generic/extra/zfs.ko
  SIGN    /lib/modules/5.15.0-72-generic/extra/zfs.ko
  DEPMOD  /lib/modules/5.15.0-72-generic

So I want to ask how this argument corresponds to 5.15.0-72-generic and fix this issue from WSL.

[rincebrain]

The problem is you need headers somewhere that match your kernel version, not that it's picking the wrong version - for reasons I don't understand, people here seem to think picking a random kernel header that seems vaguely similar in version if it can't find the right one is a feature.

[infdahai]

yeah, you are right. I didn't think about it