btrfs: introduce tickets_id to determine whether asynchronous metadata reclaim work...

[cascardo/linux.git] / fs / btrfs / extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4483487..d09cf7a 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4966,12 +4966,12 @@ static void wake_all_tickets(struct list_head *head)
  */
 static void btrfs_async_reclaim_metadata_space(struct work_struct *work)
 {
-       struct reserve_ticket *last_ticket = NULL;
        struct btrfs_fs_info *fs_info;
        struct btrfs_space_info *space_info;
        u64 to_reclaim;
        int flush_state;
        int commit_cycles = 0;
+       u64 last_tickets_id;
 
        fs_info = container_of(work, struct btrfs_fs_info, async_reclaim_work);
        space_info = __find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA);
@@ -4984,8 +4984,7 @@ static void btrfs_async_reclaim_metadata_space(struct work_struct *work)
                spin_unlock(&space_info->lock);
                return;
        }
-       last_ticket = list_first_entry(&space_info->tickets,
-                                      struct reserve_ticket, list);
+       last_tickets_id = space_info->tickets_id;
        spin_unlock(&space_info->lock);
 
        flush_state = FLUSH_DELAYED_ITEMS_NR;
@@ -5005,10 +5004,10 @@ static void btrfs_async_reclaim_metadata_space(struct work_struct *work)
                                                              space_info);
                ticket = list_first_entry(&space_info->tickets,
                                          struct reserve_ticket, list);
-               if (last_ticket == ticket) {
+               if (last_tickets_id == space_info->tickets_id) {
                        flush_state++;
                } else {
-                       last_ticket = ticket;
+                       last_tickets_id = space_info->tickets_id;
                        flush_state = FLUSH_DELAYED_ITEMS_NR;
                        if (commit_cycles)
                                commit_cycles--;
@@ -5384,6 +5383,7 @@ again:
                        list_del_init(&ticket->list);
                        num_bytes -= ticket->bytes;
                        ticket->bytes = 0;
+                       space_info->tickets_id++;
                        wake_up(&ticket->wait);
                } else {
                        ticket->bytes -= num_bytes;
@@ -5426,6 +5426,7 @@ again:
                        num_bytes -= ticket->bytes;
                        space_info->bytes_may_use += ticket->bytes;
                        ticket->bytes = 0;
+                       space_info->tickets_id++;
                        wake_up(&ticket->wait);
                } else {
                        trace_btrfs_space_reservation(fs_info, "space_info",