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authorChristoph Hellwig <hch@lst.de>2017-04-21 11:24:42 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-04-25 09:40:42 -0700
commit27af1bbf524459962d1477a38ac6e0b7f79aaecc (patch)
tree8421b1c164281b38deaf5aa7421847344b9abae1 /fs/xfs/xfs_trans_ail.c
parent3f88a15ae0f15f8dec3b10a55d02d1c1defa73c6 (diff)
xfs: remove xfs_trans_ail_delete_bulk
xfs_iflush_done uses an on-stack variable length array to pass the log items to be deleted to xfs_trans_ail_delete_bulk. On-stack VLAs are a nasty gcc extension that can lead to unbounded stack allocations, but fortunately we can easily avoid them by simply open coding xfs_trans_ail_delete_bulk in xfs_iflush_done, which is the only caller of it except for the single-item xfs_trans_ail_delete. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_trans_ail.c')
-rw-r--r--fs/xfs/xfs_trans_ail.c71
1 files changed, 35 insertions, 36 deletions
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index d6c9c3e9e02b..9056c0f34a3c 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -684,8 +684,23 @@ xfs_trans_ail_update_bulk(
}
}
-/*
- * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL
+bool
+xfs_ail_delete_one(
+ struct xfs_ail *ailp,
+ struct xfs_log_item *lip)
+{
+ struct xfs_log_item *mlip = xfs_ail_min(ailp);
+
+ trace_xfs_ail_delete(lip, mlip->li_lsn, lip->li_lsn);
+ xfs_ail_delete(ailp, lip);
+ lip->li_flags &= ~XFS_LI_IN_AIL;
+ lip->li_lsn = 0;
+
+ return mlip == lip;
+}
+
+/**
+ * Remove a log items from the AIL
*
* @xfs_trans_ail_delete_bulk takes an array of log items that all need to
* removed from the AIL. The caller is already holding the AIL lock, and done
@@ -706,52 +721,36 @@ xfs_trans_ail_update_bulk(
* before returning.
*/
void
-xfs_trans_ail_delete_bulk(
+xfs_trans_ail_delete(
struct xfs_ail *ailp,
- struct xfs_log_item **log_items,
- int nr_items,
+ struct xfs_log_item *lip,
int shutdown_type) __releases(ailp->xa_lock)
{
- xfs_log_item_t *mlip;
- int mlip_changed = 0;
- int i;
+ struct xfs_mount *mp = ailp->xa_mount;
+ bool mlip_changed;
- mlip = xfs_ail_min(ailp);
-
- for (i = 0; i < nr_items; i++) {
- struct xfs_log_item *lip = log_items[i];
- if (!(lip->li_flags & XFS_LI_IN_AIL)) {
- struct xfs_mount *mp = ailp->xa_mount;
-
- spin_unlock(&ailp->xa_lock);
- if (!XFS_FORCED_SHUTDOWN(mp)) {
- xfs_alert_tag(mp, XFS_PTAG_AILDELETE,
- "%s: attempting to delete a log item that is not in the AIL",
- __func__);
- xfs_force_shutdown(mp, shutdown_type);
- }
- return;
+ if (!(lip->li_flags & XFS_LI_IN_AIL)) {
+ spin_unlock(&ailp->xa_lock);
+ if (!XFS_FORCED_SHUTDOWN(mp)) {
+ xfs_alert_tag(mp, XFS_PTAG_AILDELETE,
+ "%s: attempting to delete a log item that is not in the AIL",
+ __func__);
+ xfs_force_shutdown(mp, shutdown_type);
}
-
- trace_xfs_ail_delete(lip, mlip->li_lsn, lip->li_lsn);
- xfs_ail_delete(ailp, lip);
- lip->li_flags &= ~XFS_LI_IN_AIL;
- lip->li_lsn = 0;
- if (mlip == lip)
- mlip_changed = 1;
+ return;
}
+ mlip_changed = xfs_ail_delete_one(ailp, lip);
if (mlip_changed) {
- if (!XFS_FORCED_SHUTDOWN(ailp->xa_mount))
- xlog_assign_tail_lsn_locked(ailp->xa_mount);
+ if (!XFS_FORCED_SHUTDOWN(mp))
+ xlog_assign_tail_lsn_locked(mp);
if (list_empty(&ailp->xa_ail))
wake_up_all(&ailp->xa_empty);
- spin_unlock(&ailp->xa_lock);
+ }
+ spin_unlock(&ailp->xa_lock);
+ if (mlip_changed)
xfs_log_space_wake(ailp->xa_mount);
- } else {
- spin_unlock(&ailp->xa_lock);
- }
}
int