Re: ZFS high CPU use after backup and panic on shutdown
- Reply: Trev : "Re: ZFS high CPU use after backup and panic on shutdown"
- In reply to: Trev : "ZFS high CPU use after backup and panic on shutdown"
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Date: Mon, 27 Nov 2023 13:09:19 UTC
Trev wrote on 25/11/23 2:39 pm:
> I recently updated from source FreeBSD 12-STABLE to FreeBSD 13-STABLE
> (stable/13-221a60a42: Tue Nov 14 15:36:40 AEDT 2023).
>
> Ever since, after my ZFS backup to an external USB drive, the system
> continues to consume 100% of one core of the 2011 Mac mini (i7, 16G).
>
> Example backup command from my shell script:
>
> zfs send data/www@${snapshot} | bzip2 > /mnt/zfs-data-www-${snapshot}.bz2
>
> Neither top, vmstat nor iostat give any clue as to what system process
> is using 100% of one core. To stop this phenomenon I have to shutdown
> and reboot the system which I do with "shutdown -r now".
>
> This always results in a kernel panic:
[CHOMP]
Resolved by updating the source to stable/13-ecb4d2c6e: Sat Nov 25
11:31:12 AEDT 2023 and rebuilding.
[Also, thanks to Mike Karels for off-list help with top.]