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btrfs: check tickets after waiting on ordered extents 

Right now if the space is freed up after the ordered extents complete
(which is likely since the reservations are held until they complete),
we would do extra delalloc flushing before we'd notice that we didn't
have any more tickets.  Fix this by moving the tickets check after our
wait_ordered_extents check.

Tested-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-07-21 10:22:22 -04:00 committed by David Sterba
parent 38d715f494
commit 448b966b49
1 changed files with 9 additions and 8 deletions
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17
fs/btrfs/space-info.c
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@ -545,14 +545,6 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info,
while ((delalloc_bytes || dio_bytes) && loops < 3) {
btrfs_start_delalloc_roots(fs_info, items);
spin_lock(&space_info->lock);
if (list_empty(&space_info->tickets) &&
list_empty(&space_info->priority_tickets)) {
spin_unlock(&space_info->lock);
break;
}
spin_unlock(&space_info->lock);
loops++;
if (wait_ordered && !trans) {
btrfs_wait_ordered_roots(fs_info, items, 0, (u64)-1);
@ -561,6 +553,15 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info,
if (time_left)
break;
}
spin_lock(&space_info->lock);
if (list_empty(&space_info->tickets) &&
list_empty(&space_info->priority_tickets)) {
spin_unlock(&space_info->lock);
break;
}
spin_unlock(&space_info->lock);
delalloc_bytes = percpu_counter_sum_positive(
&fs_info->delalloc_bytes);
dio_bytes = percpu_counter_sum_positive(&fs_info->dio_bytes);