How to compile ZFS only ?

[Xin LI]

Why not just -DNO_CLEAN= with 'make buildkernel'?

But to answer your question, 'make buildkernel' will take e.g.
'KERNCONF' aka kernel build configuration into account, while if you
do make directly, it's not (and sometimes build options in the kernel
build configuration, like WITNESS, etc., have material impact to data
structure layouts).

On Wed, Mar 22, 2017 at 2:47 PM, Ben RUBSON <ben.rubson at gmail.com> wrote:
> Thank you for your answer Steven.
> Unfortunately it did not help, same behaviour :
> Module with you method has the same smaller size, 2323000 bytes vs 2500544.
> (I then did not try to boot with it)
>
> Ben
>
>> On 22 Mar 2017, at 22:09, Steven Hartland <killing at multiplay.co.uk> wrote:
>>
>> cd /usr/src
>> make buildenv
>> cd sys/modules/zfs/
>> make
>> make install
>>
>> On 22/03/2017 20:57, Ben RUBSON wrote:
>>> Hi,
>>>
>>> I'm trying to rebuild ZFS (with some patches) without having to rebuild whole kernel.
>>>
>>> What I then try :
>>> # cd /usr/src/sys/modules/zfs/
>>> # make
>>> # cp zfs.ko /boot/kernel/ #to replace current zfs module
>>>
>>> But then server does not reboot properly (/ is on ZFS).
>>>
>>> If I do :
>>> # cd /usr/src/
>>> # make buildkernel KERNCONF=GENERIC
>>> # cp /usr/obj/usr/src/sys/GENERIC/modules/usr/src/sys/modules/zfs/zfs.ko /boot/kernel/
>>>
>>> Then server correctly reboot.
>>>
>>> I clearly see that zfs.ko in method 1 is slightly smaller that in method 2.
>>>
>>> Am I missing something ? (of course yes, but what ? :)
>>>
>>> Many thanks !
>>>
>>> Best regards,
>>>
>>> Ben
>>>
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>>
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