From: Dave Chinner <dchinner@xxxxxxxxxx>
We now have two copies of AIL insert operations that are mostly
duplicate functionality. The single log item updates can be
implemented via the bulk updates by turning xfs_trans_ail_update()
into a simple wrapper. This removes all the duplicate insert
functionality and associated helpers.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
fs/xfs/xfs_trans_ail.c | 95 ++---------------------------------------------
fs/xfs/xfs_trans_priv.h | 21 +++++++---
2 files changed, 18 insertions(+), 98 deletions(-)
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index d450092..2f44f92 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -28,7 +28,6 @@
#include "xfs_trans_priv.h"
#include "xfs_error.h"
-STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *);
STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t);
STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *);
STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *);
@@ -450,67 +449,16 @@ xfs_trans_unlocked_item(
xfs_log_move_tail(ailp->xa_mount, 1);
} /* xfs_trans_unlocked_item */
-
-/*
- * Update the position of the item in the AIL with the new
- * lsn. If it is not yet in the AIL, add it. Otherwise, move
- * it to its new position by removing it and re-adding it.
- *
- * Wakeup anyone with an lsn less than the item's lsn. If the item
- * we move in the AIL is the minimum one, update the tail lsn in the
- * log manager.
- *
- * This function must be called with the AIL lock held. The lock
- * is dropped before returning.
- */
-void
-xfs_trans_ail_update(
- struct xfs_ail *ailp,
- xfs_log_item_t *lip,
- xfs_lsn_t lsn) __releases(ailp->xa_lock)
-{
- xfs_log_item_t *mlip; /* ptr to minimum lip */
- xfs_lsn_t tail_lsn;
-
- mlip = xfs_ail_min(ailp);
-
- if (lip->li_flags & XFS_LI_IN_AIL) {
- xfs_ail_delete(ailp, lip);
- } else {
- lip->li_flags |= XFS_LI_IN_AIL;
- }
-
- lip->li_lsn = lsn;
- xfs_ail_insert(ailp, lip);
-
- if (mlip == lip) {
- mlip = xfs_ail_min(ailp);
- /*
- * It is not safe to access mlip after the AIL lock is
- * dropped, so we must get a copy of li_lsn before we do
- * so. This is especially important on 32-bit platforms
- * where accessing and updating 64-bit values like li_lsn
- * is not atomic.
- */
- tail_lsn = mlip->li_lsn;
- spin_unlock(&ailp->xa_lock);
- xfs_log_move_tail(ailp->xa_mount, tail_lsn);
- } else {
- spin_unlock(&ailp->xa_lock);
- }
-
-
-} /* xfs_trans_update_ail */
-
/*
* Bulk update version of xfs_trans_ail_update.
*
* This version takes an array of log items that all need to be positioned at
* the same LSN in the AIL. This function takes the AIL lock once to execute
* the update operations on all the items in the array, and as such shoul dnot
- * be called with the AIL lock held. As a result, once we have the AIL lock,
- * we need to check each log item LSN to confirm it needs to be moved forward
- * in the AIL.
+ * be called with the AIL lock held. As a result, once we have the AIL lock, we
+ * need to check each log item LSN to confirm it needs to be moved forward in
+ * the AIL. If the item we move in the AIL is the minimum one, update the tail
+ * lsn in the log manager.
*
* To optimise the insert operation, we delete all the items from the AIL in
* the first pass, moving them into a temporary list, then splice the temporary
@@ -751,41 +699,6 @@ xfs_trans_ail_destroy(
}
/*
- * Insert the given log item into the AIL.
- * We almost always insert at the end of the list, so on inserts
- * we search from the end of the list to find where the
- * new item belongs.
- */
-STATIC void
-xfs_ail_insert(
- struct xfs_ail *ailp,
- xfs_log_item_t *lip)
-{
- xfs_log_item_t *next_lip;
-
- /*
- * If the list is empty, just insert the item.
- */
- if (list_empty(&ailp->xa_ail)) {
- list_add(&lip->li_ail, &ailp->xa_ail);
- return;
- }
-
- list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) {
- if (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0)
- break;
- }
-
- ASSERT((&next_lip->li_ail == &ailp->xa_ail) ||
- (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0));
-
- list_add(&lip->li_ail, &next_lip->li_ail);
-
- xfs_ail_check(ailp, lip);
- return;
-}
-
-/*
* splice the log item list into the AIL at the given LSN.
*/
STATIC void
diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index 4ab7377..1cf42e7 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -75,13 +75,20 @@ struct xfs_ail {
/*
* From xfs_trans_ail.c
*/
-void xfs_trans_ail_update(struct xfs_ail *ailp,
- struct xfs_log_item *lip, xfs_lsn_t lsn)
- __releases(ailp->xa_lock);
-void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
- struct xfs_log_item **lgia,
- int nr_items, xfs_lsn_t lsn)
- __releases(ailp->xa_lock);
+void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
+ struct xfs_log_item **lgia, int nr_items,
+ xfs_lsn_t lsn) __releases(ailp->xa_lock);
+static inline void
+xfs_trans_ail_update(
+ struct xfs_ail *ailp,
+ xfs_log_item_t *lip,
+ xfs_lsn_t lsn) __releases(ailp->xa_lock)
+{
+ struct xfs_log_item *lgia[1] = { lip, };
+
+ xfs_trans_ail_update_bulk(ailp, lgia, 1, lsn);
+}
+
void xfs_trans_ail_delete(struct xfs_ail *ailp,
struct xfs_log_item *lip)
__releases(ailp->xa_lock);
--
1.7.2.3
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