Boot error with OpenZFS

[Guido Falsi]

On 08/09/20 19:30, Mark Johnston wrote:
> On Tue, Sep 08, 2020 at 07:24:38PM +0200, Guido Falsi wrote:
>> On 08/09/20 10:01, Guido Falsi wrote:
>>> Hi,
>>>
>>> I'm trying to update to recent head, but I can't boot my system with the
>>> compiled kernel.
>>>
>>> The system has ZFS on root and was working with previous kernel (before
>>> OpenZFS migration).
>>>
>>> I'm trying to boot r365437.
>>>
>>> I load zfs from loader with zfs_load="YES" as usual and get this error
>>> message at the start of kernel output:
>>>
>>> link_elf_obj: symbol lockstat_enabled undefined
>>> KLD file zfs.ko - could not finalize loading
>>>
>>> The zfs.ko file is aligned with the kernel and I did not observe errors
>>> while compiling.
>>>
>>> I am able to make the machine using the kernel from the most recent head
>>> snapshot on ftp.freebsd.org [1]. I'm also going to try with a kernel
>>> with debug symbols and one with GENERIC config.
>>
>> A locally built GENERIC works fine, so this is my fault. I clearly have
>> something wrong in my kernel config.
>>
>> I'll report anyway as soon as I discover what it is.
> 
> Can you verify that adding "options KDTRACE_HOOKS" fixes the problem?  I
> note that the zfs.ko Makefile has -DKTRACE_HOOKS in CFLAGS, among a few
> other surprising things.

I am in the process of testing that. The machine is compiling. I also
noticed in sys/conf/files:

kern/kern_lockstat.c		optional kdtrace_hooks

I'll report back shortly once I've tested it.

-- 
Guido Falsi <madpilot at FreeBSD.org>