On Sat, Sep 29, 2012 at 10:20:09PM +0900, Itaru Kitayama wrote: > --- a/fs/btrfs/extent-tree.c > +++ b/fs/btrfs/extent-tree.c > @@ -3712,7 +3712,7 @@ static void shrink_delalloc(struct btrfs_root *root, > u64 t > while (delalloc_bytes && loops < 3) { > max_reclaim = min(delalloc_bytes, to_reclaim); > nr_pages = max_reclaim >> PAGE_CACHE_SHIFT; > - writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages, > + if (!bdi_write_congested(root->fs_info->sb->s_bdi)) > writeback_in > WB_REASON_FS_FREE_SPACE);
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