[PATCH v5 3/3] btrfs: reserve new relocation block-group after successful relocation

From: Johannes Thumshirn
Date: Fri May 24 2024 - 12:30:11 EST


From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>

After we've committed a relocation transaction, we know we have just freed
up space. Set it as hint for the next relocation.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: Naohiro Aota <naohiro.aota@xxxxxxx>
---
fs/btrfs/relocation.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 39e2db9af64f..29d235003ff1 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3811,6 +3811,13 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
ret = btrfs_commit_transaction(trans);
if (ret && !err)
err = ret;
+
+ /*
+ * We know we have just freed space, set it as hint for the
+ * next relocation.
+ */
+ if (!err)
+ btrfs_reserve_relocation_bg(fs_info);
out_free:
ret = clean_dirty_subvols(rc);
if (ret < 0 && !err)

--
2.43.0