btrfs: zoned: activate metadata block group on flush_space

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[ Upstream commit b093151391 ]

For metadata space on zoned filesystem, reaching ALLOC_CHUNK{,_FORCE}
means we don't have enough space left in the active_total_bytes. Before
allocating a new chunk, we can try to activate an existing block group
in this case.

Also, allocating a chunk is not enough to grant a ticket for metadata
space on zoned filesystem we need to activate the block group to
increase the active_total_bytes.

btrfs_zoned_activate_one_bg() implements the activation feature. It will
activate a block group by (maybe) finishing a block group. It will give up
activating a block group if it cannot finish any block group.

CC: stable@vger.kernel.org # 5.16+
Fixes: afba2bc036 ("btrfs: zoned: implement active zone tracking")
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Naohiro Aota 2022-07-09 08:18:47 +09:00 • committed by Greg Kroah-Hartman

parent 33ed56fe55

commit 407b66b662

3 changed files with 93 additions and 0 deletions

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30

fs/btrfs/space-info.c

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53

fs/btrfs/zoned.c

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10

fs/btrfs/zoned.h

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