Btrfs: Replace the transaction work queue with kthreads

This creates one kthread for commits and one kthread for
deleting old snapshots.  All the work queues are removed.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 9 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index e9bbb53eda63..244fe86bcc55 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -23,7 +23,6 @@
 #include <linux/mm.h>
 #include <linux/highmem.h>
 #include <linux/fs.h>
-#include <linux/workqueue.h>
 #include <linux/completion.h>
 #include <linux/backing-dev.h>
 #include <asm/kmap_types.h>
@@ -519,15 +518,14 @@ struct btrfs_fs_info {
         struct backing_dev_info bdi;
         spinlock_t hash_lock;
         struct mutex trans_mutex;
+        struct mutex transaction_kthread_mutex;
+        struct mutex cleaner_mutex;
         struct mutex alloc_mutex;
         struct mutex chunk_mutex;
         struct mutex drop_mutex;
         struct list_head trans_list;
         struct list_head hashers;
         struct list_head dead_roots;
-        struct list_head end_io_work_list;
-        struct work_struct end_io_work;
-        spinlock_t end_io_work_lock;
         atomic_t nr_async_submits;
 
         /*
@@ -543,13 +541,10 @@ struct btrfs_fs_info {
         struct btrfs_workers workers;
         struct btrfs_workers endio_workers;
         struct btrfs_workers submit_workers;
+        struct task_struct *transaction_kthread;
+        struct task_struct *cleaner_kthread;
         int thread_pool_size;
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
-        struct work_struct trans_work;
-#else
-        struct delayed_work trans_work;
-#endif
         struct kobject super_kobj;
         struct completion kobj_unregister;
         int do_barriers;