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btrfs: Add high priority workqueue support for btrfs_workqueue_struct

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Add high priority function to btrfs_workqueue.

This is implemented by embedding a btrfs_workqueue into a
btrfs_workqueue and use some helper functions to differ the normal
priority wq and high priority wq.
So the high priority wq is completely independent from the normal
workqueue.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Tested-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Qu Wenruo 2014-02-28 10:46:04 +08:00 • committed by Josef Bacik
parent 08a9ff3264
commit 1ca08976ae
2 changed files with 84 additions and 14 deletions
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5
fs/btrfs/async-thread.h
View file

@ -121,6 +121,8 @@ void btrfs_requeue_work(struct btrfs_work *work);
void btrfs_set_work_high_prio(struct btrfs_work *work);
struct btrfs_workqueue_struct;
/* Internal use only */
struct __btrfs_workqueue_struct;
struct btrfs_work_struct {
void (*func)(struct btrfs_work_struct *arg);
@ -130,7 +132,7 @@ struct btrfs_work_struct {
/* Don't touch things below */
struct work_struct normal_work;
struct list_head ordered_list;
struct btrfs_workqueue_struct *wq;
struct __btrfs_workqueue_struct *wq;
unsigned long flags;
};
@ -145,4 +147,5 @@ void btrfs_queue_work(struct btrfs_workqueue_struct *wq,
struct btrfs_work_struct *work);
void btrfs_destroy_workqueue(struct btrfs_workqueue_struct *wq);
void btrfs_workqueue_set_max(struct btrfs_workqueue_struct *wq, int max);
void btrfs_set_work_high_priority(struct btrfs_work_struct *work);
#endif