linux-kernel - [PATCH 2/2] btrfs: reserve new relocation zone after successful relocation

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Message-Id: <20240514-zoned-gc-v1-2-109f1a6c7447@kernel.org>
Date: Tue, 14 May 2024 23:13:22 +0200
From: Johannes Thumshirn <jth@...nel.org>
To: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, 
 David Sterba <dsterba@...e.com>
Cc: Hans Holmberg <Hans.Holmberg@....com>, linux-btrfs@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH 2/2] btrfs: reserve new relocation zone after successful
 relocation

From: Johannes Thumshirn <johannes.thumshirn@....com>

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@....com>
---
 fs/btrfs/relocation.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 8b24bb5a0aa1..d943abf5cb33 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3808,9 +3808,13 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
 		err = PTR_ERR(trans);
 		goto out_free;
 	}
+
 	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 */
+	btrfs_reserve_relocation_zone(fs_info);
 out_free:
 	ret = clean_dirty_subvols(rc);
 	if (ret < 0 && !err)

-- 
2.35.3