diff options
| -rw-r--r-- | fs/fs-writeback.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index c98d3923d9a9..921a9e43b1db 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -189,6 +189,9 @@ static void __wb_start_writeback(struct bdi_writeback *wb, long nr_pages, { struct wb_writeback_work *work; + if (!wb_has_dirty_io(wb)) + return; + /* * This is WB_SYNC_NONE writeback, so if allocation fails just * wakeup the thread for old dirty data writeback @@ -1215,11 +1218,8 @@ void wakeup_flusher_threads(long nr_pages, enum wb_reason reason) nr_pages = get_nr_dirty_pages(); rcu_read_lock(); - list_for_each_entry_rcu(bdi, &bdi_list, bdi_list) { - if (!bdi_has_dirty_io(bdi)) - continue; + list_for_each_entry_rcu(bdi, &bdi_list, bdi_list) __wb_start_writeback(&bdi->wb, nr_pages, false, reason); - } rcu_read_unlock(); } @@ -1512,11 +1512,12 @@ void writeback_inodes_sb_nr(struct super_block *sb, .nr_pages = nr, .reason = reason, }; + struct backing_dev_info *bdi = sb->s_bdi; - if (sb->s_bdi == &noop_backing_dev_info) + if (!bdi_has_dirty_io(bdi) || bdi == &noop_backing_dev_info) return; WARN_ON(!rwsem_is_locked(&sb->s_umount)); - wb_queue_work(&sb->s_bdi->wb, &work); + wb_queue_work(&bdi->wb, &work); wait_for_completion(&done); } EXPORT_SYMBOL(writeback_inodes_sb_nr); @@ -1594,13 +1595,14 @@ void sync_inodes_sb(struct super_block *sb) .reason = WB_REASON_SYNC, .for_sync = 1, }; + struct backing_dev_info *bdi = sb->s_bdi; /* Nothing to do? */ - if (sb->s_bdi == &noop_backing_dev_info) + if (!bdi_has_dirty_io(bdi) || bdi == &noop_backing_dev_info) return; WARN_ON(!rwsem_is_locked(&sb->s_umount)); - wb_queue_work(&sb->s_bdi->wb, &work); + wb_queue_work(&bdi->wb, &work); wait_for_completion(&done); wait_sb_inodes(sb); |