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| author | Filipe Manana <fdmanana@suse.com> | 2023-07-26 16:57:10 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-08-21 14:52:18 +0200 |
| commit | 2391245ac2875f784335b9148079c6e73639a5f7 (patch) | |
| tree | d5d04cbbaffdd576bc3a5ec0c73338c2b28f905f /fs | |
| parent | ed8947bc73aa5bf0ddb5473eafadaa5d740f2f3f (diff) | |
| download | linux-2391245ac2875f784335b9148079c6e73639a5f7.tar.gz linux-2391245ac2875f784335b9148079c6e73639a5f7.tar.bz2 linux-2391245ac2875f784335b9148079c6e73639a5f7.zip | |
btrfs: avoid starting new transaction when flushing delayed items and refs
When flushing space we join a transaction to flush delayed items and
delayed references, in order to try to release space. However using
btrfs_join_transaction() not only joins an existing transaction as well
as it starts a new transaction if there is none open. If there is no
transaction open, we don't have neither delayed items nor delayed
references, so creating a new transaction is a waste of time, IO and
creates an unnecessary rotation of the backup roots without gaining any
benefits (including releasing space).
So use btrfs_join_transaction_nostart() when attempting to flush delayed
items and references.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/space-info.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index be5ce209b918..2db92a201697 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -725,9 +725,11 @@ static void flush_space(struct btrfs_fs_info *fs_info, else nr = -1; - trans = btrfs_join_transaction(root); + trans = btrfs_join_transaction_nostart(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); + if (ret == -ENOENT) + ret = 0; break; } ret = btrfs_run_delayed_items_nr(trans, nr); @@ -743,9 +745,11 @@ static void flush_space(struct btrfs_fs_info *fs_info, break; case FLUSH_DELAYED_REFS_NR: case FLUSH_DELAYED_REFS: - trans = btrfs_join_transaction(root); + trans = btrfs_join_transaction_nostart(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); + if (ret == -ENOENT) + ret = 0; break; } if (state == FLUSH_DELAYED_REFS_NR) |