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From: Forza <forza@tnonline.net>
To: linux-btrfs@vger.kernel.org
Subject: Automatic block group reclaim not working as expected?
Date: Thu, 9 Feb 2023 10:46:32 +0100 (GMT+01:00)	[thread overview]
Message-ID: <e99483.c11a58d.1863591ca52@tnonline.net> (raw)

I have set set /sys/fs/btrfs/<uuid>/allocation/data/bg_reclaim_threshold to 75

It seems that the calculation isn't correct as I can see chunks with 300-400% usage in dmesg, which obviously seems wrong.

The filesystem is a raid10 with 10 devices.

dmesg:
[865863.062502] BTRFS info (device sdi1): reclaiming chunk 35605527068672 with 369% used 0% unusable
[865863.062552] BTRFS info (device sdi1): relocating block group 35605527068672 flags data|raid10
[865892.749204] BTRFS info (device sdi1): found 5729 extents, stage: move data extents
[866217.588422] BTRFS info (device sdi1): found 5721 extents, stage: update data pointers

I have tested with kernels 6.1.6 and 6.1.8

             reply	other threads:[~2023-02-09 10:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-09  9:46 Forza [this message]
2023-02-09 10:36 ` Automatic block group reclaim not working as expected? Johannes Thumshirn
2023-02-09 15:13   ` Forza
2023-02-09 17:46     ` Forza
2023-02-10 10:27       ` Johannes Thumshirn
2023-02-10 15:14         ` Forza
2023-02-14  7:41           ` Forza
2023-02-14 14:32             ` Johannes Thumshirn
2023-02-21 16:25               ` Johannes Thumshirn
2023-02-21 17:07                 ` Forza
2023-02-21 17:52                   ` Johannes Thumshirn

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