btrfs puts dirty inodes on there, so it must register a thread to handle them. Also fixes failure to check bdi_init() return value, and bad inherit of ->capabilities flags from the default bdi. Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> --- fs/btrfs/disk-io.c | 23 ++++++++++++++++++----- 1 files changed, 18 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 92caa80..3c91484 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1366,12 +1366,24 @@ static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) free_extent_map(em); } +/* + * If this fails, caller must call bdi_destroy() to get rid of the + * bdi again. + */ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) { - bdi_init(bdi); + int err; + + bdi->capabilities = BDI_CAP_MAP_COPY; + err = bdi_init(bdi); + if (err) + return err; + + err = bdi_register(bdi, NULL, "btrfs"); + if (err) + return err; + bdi->ra_pages = default_backing_dev_info.ra_pages; - bdi->state = 0; - bdi->capabilities = default_backing_dev_info.capabilities; bdi->unplug_io_fn = btrfs_unplug_io_fn; bdi->unplug_io_data = info; bdi->congested_fn = btrfs_congested_fn; @@ -1595,7 +1607,8 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info->sb = sb; fs_info->max_extent = (u64)-1; fs_info->max_inline = 8192 * 1024; - setup_bdi(fs_info, &fs_info->bdi); + if (setup_bdi(fs_info, &fs_info->bdi)) + goto fail_bdi; fs_info->btree_inode = new_inode(sb); fs_info->btree_inode->i_ino = 1; fs_info->btree_inode->i_nlink = 1; @@ -1951,8 +1964,8 @@ fail_iput: btrfs_close_devices(fs_info->fs_devices); btrfs_mapping_tree_free(&fs_info->mapping_tree); +fail_bdi: bdi_destroy(&fs_info->bdi); - fail: kfree(extent_root); kfree(tree_root); -- 1.6.2.2.446.gfbdc0 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html