On 08/03/2021 05:24, Yoshihiro Ota wrote:
> On Sun, 7 Mar 2021 00:09:33 +0200
> Andriy Gapon <a...@freebsd.org> wrote:
> 
>> On 06/03/2021 20:09, Yoshihiro Ota wrote:
>>> Hi all,
>>>
>>> I'm upgrading fron 12.2-RELEASE to 13-BETA/RC one by one.
>>>
>>> After upgrading one in VMWare, 'zfs mount -a' hangs the system.
>>> I don't have boottime zfs mount on nor don't have zfsroot.
>>> I just simply ran install world/kernel and mergemaster.
>>
>> Please use procstat -kk to capture a kernel stack trace of the hung process.
> 
> Actually, spining was 'kldload zfs'.
> Console doesn't response but ping and sshd sessions still work.
> procstat output is below.
> In addition, this doesn't happen to systems that I've been following 
> 13-CURRENT
> but rather happen only wiht a system upgraded from 12.2-RELEASE to 13-RC.
> 
> 
> # procstat -kk 1049
>   PID    TID COMM                TDNAME              KSTACK                   
>     
>  1049 100215 kldload             -                   spa_init+0xc6 
> zfs_kmod_init+0x1a zfs_modevent+0x34 module_register_init+0x8c 
> linker_load_module+0xaab kern_kldload+0xc1 sys_kldload+0x50 syscall+0x17d 
> g_ctx+0xe280bf29 
> 

If you could use kgdb to find out what source code line spa_init+0xc6
corresponds to that may help to see what's going on.

-- 
Andriy Gapon
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