diff options
| -rw-r--r-- | fs/btrfs/extent-tree.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index d8da538d01fb..83bffbea7d97 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4079,9 +4079,19 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, * We need to wait for the async pages to actually start before * we do anything. */ - wait_event(root->fs_info->async_submit_wait, - !atomic_read(&root->fs_info->async_delalloc_pages)); + max_reclaim = atomic_read(&root->fs_info->async_delalloc_pages); + if (!max_reclaim) + goto skip_async; + + if (max_reclaim <= nr_pages) + max_reclaim = 0; + else + max_reclaim -= nr_pages; + wait_event(root->fs_info->async_submit_wait, + atomic_read(&root->fs_info->async_delalloc_pages) <= + (int)max_reclaim); +skip_async: if (!trans) flush = BTRFS_RESERVE_FLUSH_ALL; else |