Currently, btrfs_zone_finish_endio() finishes a block group only when the written region reaches the end of the block group. We can also finish the block group when no more allocation is possible.

Cc: stable@vger.kernel.org # 5.16+ Fixes: be1a1d7a5d24 ("btrfs: zoned: finish fully written block group") Reviewed-by: Pankaj Raghav p.raghav@samsung.com Signed-off-by: Naohiro Aota naohiro.aota@wdc.com --- fs/btrfs/zoned.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 0286fb1c63db..320bb7ba1c49 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -2021,6 +2021,7 @@ bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length) { struct btrfs_block_group *block_group; + u64 min_alloc_bytes;

if (!btrfs_is_zoned(fs_info)) return; @@ -2028,7 +2029,15 @@ void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 len block_group = btrfs_lookup_block_group(fs_info, logical); ASSERT(block_group);

- if (logical + length < block_group->start + block_group->zone_capacity) + /* No MIXED BG on zoned btrfs. */ + if (block_group->flags & BTRFS_BLOCK_GROUP_DATA) + min_alloc_bytes = fs_info->sectorsize; + else + min_alloc_bytes = fs_info->nodesize; + + /* Bail out if we can allocate more data from this BG. */ + if (logical + length + min_alloc_bytes <= + block_group->start + block_group->zone_capacity) goto out;

do_zone_finish(block_group, true);