* [PATCH] Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head
@ 2017-01-30 20:24 Liu Bo
2017-02-02 17:38 ` David Sterba
0 siblings, 1 reply; 2+ messages in thread
From: Liu Bo @ 2017-01-30 20:24 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
All we need is @delayed_refs, all callers have get it ahead of calling
btrfs_find_delayed_ref_head since lock needs to be acquired firstly, there is
no reason to deference it again inside the function.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
fs/btrfs/backref.c | 2 +-
fs/btrfs/delayed-ref.c | 5 +----
fs/btrfs/delayed-ref.h | 3 ++-
fs/btrfs/extent-tree.c | 6 +++---
4 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 8299601..db70659 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1284,7 +1284,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
*/
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
- head = btrfs_find_delayed_ref_head(trans, bytenr);
+ head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (head) {
if (!mutex_trylock(&head->mutex)) {
atomic_inc(&head->node.refs);
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index ef724a5..aebb48c 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -911,11 +911,8 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
* the head node if any where found, or NULL if not.
*/
struct btrfs_delayed_ref_head *
-btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr)
+btrfs_find_delayed_ref_head(struct btrfs_delayed_ref_root *delayed_refs, u64 bytenr)
{
- struct btrfs_delayed_ref_root *delayed_refs;
-
- delayed_refs = &trans->transaction->delayed_refs;
return find_ref_head(&delayed_refs->href_root, bytenr, 0);
}
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index 50947b5..22ca93b 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -262,7 +262,8 @@ void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_head *head);
struct btrfs_delayed_ref_head *
-btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr);
+btrfs_find_delayed_ref_head(struct btrfs_delayed_ref_root *delayed_refs,
+ u64 bytenr);
int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_head *head);
static inline void btrfs_delayed_ref_unlock(struct btrfs_delayed_ref_head *head)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e97302f..ed254b8 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -888,7 +888,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
- head = btrfs_find_delayed_ref_head(trans, bytenr);
+ head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (head) {
if (!mutex_trylock(&head->mutex)) {
atomic_inc(&head->node.refs);
@@ -3038,7 +3038,7 @@ static noinline int check_delayed_ref(struct btrfs_trans_handle *trans,
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
- head = btrfs_find_delayed_ref_head(trans, bytenr);
+ head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (!head) {
spin_unlock(&delayed_refs->lock);
return 0;
@@ -7092,7 +7092,7 @@ static noinline int check_ref_cleanup(struct btrfs_trans_handle *trans,
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
- head = btrfs_find_delayed_ref_head(trans, bytenr);
+ head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (!head)
goto out_delayed_unlock;
--
2.5.5
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head
2017-01-30 20:24 [PATCH] Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head Liu Bo
@ 2017-02-02 17:38 ` David Sterba
0 siblings, 0 replies; 2+ messages in thread
From: David Sterba @ 2017-02-02 17:38 UTC (permalink / raw)
To: Liu Bo; +Cc: linux-btrfs, David Sterba
On Mon, Jan 30, 2017 at 12:24:37PM -0800, Liu Bo wrote:
> All we need is @delayed_refs, all callers have get it ahead of calling
> btrfs_find_delayed_ref_head since lock needs to be acquired firstly, there is
> no reason to deference it again inside the function.
>
> Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2017-02-02 17:39 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-01-30 20:24 [PATCH] Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head Liu Bo
2017-02-02 17:38 ` David Sterba
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).