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-rw-r--r--fs/btrfs/async-thread.c60
-rw-r--r--fs/btrfs/async-thread.h2
-rw-r--r--fs/btrfs/disk-io.c5
-rw-r--r--fs/btrfs/extent_io.c2
-rw-r--r--fs/btrfs/file.c2
5 files changed, 56 insertions, 15 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 51bfdfc..502c3d6 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -25,6 +25,7 @@
#define WORK_QUEUED_BIT 0
#define WORK_DONE_BIT 1
#define WORK_ORDER_DONE_BIT 2
+#define WORK_HIGH_PRIO_BIT 3
/*
* container for the kthread task pointer and the list of pending work
@@ -36,6 +37,7 @@ struct btrfs_worker_thread {
/* list of struct btrfs_work that are waiting for service */
struct list_head pending;
+ struct list_head prio_pending;
/* list of worker threads from struct btrfs_workers */
struct list_head worker_list;
@@ -103,10 +105,16 @@ static noinline int run_ordered_completions(struct btrfs_workers *workers,
spin_lock_irqsave(&workers->lock, flags);
- while (!list_empty(&workers->order_list)) {
- work = list_entry(workers->order_list.next,
- struct btrfs_work, order_list);
-
+ while (1) {
+ if (!list_empty(&workers->prio_order_list)) {
+ work = list_entry(workers->prio_order_list.next,
+ struct btrfs_work, order_list);
+ } else if (!list_empty(&workers->order_list)) {
+ work = list_entry(workers->order_list.next,
+ struct btrfs_work, order_list);
+ } else {
+ break;
+ }
if (!test_bit(WORK_DONE_BIT, &work->flags))
break;
@@ -143,8 +151,14 @@ static int worker_loop(void *arg)
do {
spin_lock_irq(&worker->lock);
again_locked:
- while (!list_empty(&worker->pending)) {
- cur = worker->pending.next;
+ while (1) {
+ if (!list_empty(&worker->prio_pending))
+ cur = worker->prio_pending.next;
+ else if (!list_empty(&worker->pending))
+ cur = worker->pending.next;
+ else
+ break;
+
work = list_entry(cur, struct btrfs_work, list);
list_del(&work->list);
clear_bit(WORK_QUEUED_BIT, &work->flags);
@@ -163,7 +177,6 @@ again_locked:
spin_lock_irq(&worker->lock);
check_idle_worker(worker);
-
}
if (freezing(current)) {
worker->working = 0;
@@ -178,7 +191,8 @@ again_locked:
* jump_in?
*/
smp_mb();
- if (!list_empty(&worker->pending))
+ if (!list_empty(&worker->pending) ||
+ !list_empty(&worker->prio_pending))
continue;
/*
@@ -191,7 +205,8 @@ again_locked:
*/
schedule_timeout(1);
smp_mb();
- if (!list_empty(&worker->pending))
+ if (!list_empty(&worker->pending) ||
+ !list_empty(&worker->prio_pending))
continue;
if (kthread_should_stop())
@@ -200,7 +215,8 @@ again_locked:
/* still no more work?, sleep for real */
spin_lock_irq(&worker->lock);
set_current_state(TASK_INTERRUPTIBLE);
- if (!list_empty(&worker->pending))
+ if (!list_empty(&worker->pending) ||
+ !list_empty(&worker->prio_pending))
goto again_locked;
/*
@@ -248,6 +264,7 @@ void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max)
INIT_LIST_HEAD(&workers->worker_list);
INIT_LIST_HEAD(&workers->idle_list);
INIT_LIST_HEAD(&workers->order_list);
+ INIT_LIST_HEAD(&workers->prio_order_list);
spin_lock_init(&workers->lock);
workers->max_workers = max;
workers->idle_thresh = 32;
@@ -273,6 +290,7 @@ int btrfs_start_workers(struct btrfs_workers *workers, int num_workers)
}
INIT_LIST_HEAD(&worker->pending);
+ INIT_LIST_HEAD(&worker->prio_pending);
INIT_LIST_HEAD(&worker->worker_list);
spin_lock_init(&worker->lock);
atomic_set(&worker->num_pending, 0);
@@ -396,7 +414,10 @@ int btrfs_requeue_work(struct btrfs_work *work)
goto out;
spin_lock_irqsave(&worker->lock, flags);
- list_add_tail(&work->list, &worker->pending);
+ if (test_bit(WORK_HIGH_PRIO_BIT, &work->flags))
+ list_add_tail(&work->list, &worker->prio_pending);
+ else
+ list_add_tail(&work->list, &worker->pending);
atomic_inc(&worker->num_pending);
/* by definition we're busy, take ourselves off the idle
@@ -422,6 +443,11 @@ out:
return 0;
}
+void btrfs_set_work_high_prio(struct btrfs_work *work)
+{
+ set_bit(WORK_HIGH_PRIO_BIT, &work->flags);
+}
+
/*
* places a struct btrfs_work into the pending queue of one of the kthreads
*/
@@ -438,7 +464,12 @@ int btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work)
worker = find_worker(workers);
if (workers->ordered) {
spin_lock_irqsave(&workers->lock, flags);
- list_add_tail(&work->order_list, &workers->order_list);
+ if (test_bit(WORK_HIGH_PRIO_BIT, &work->flags)) {
+ list_add_tail(&work->order_list,
+ &workers->prio_order_list);
+ } else {
+ list_add_tail(&work->order_list, &workers->order_list);
+ }
spin_unlock_irqrestore(&workers->lock, flags);
} else {
INIT_LIST_HEAD(&work->order_list);
@@ -446,7 +477,10 @@ int btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work)
spin_lock_irqsave(&worker->lock, flags);
- list_add_tail(&work->list, &worker->pending);
+ if (test_bit(WORK_HIGH_PRIO_BIT, &work->flags))
+ list_add_tail(&work->list, &worker->prio_pending);
+ else
+ list_add_tail(&work->list, &worker->pending);
atomic_inc(&worker->num_pending);
check_busy_worker(worker);
diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h
index 31be4ed..1b511c1 100644
--- a/fs/btrfs/async-thread.h
+++ b/fs/btrfs/async-thread.h
@@ -85,6 +85,7 @@ struct btrfs_workers {
* of work items waiting for completion
*/
struct list_head order_list;
+ struct list_head prio_order_list;
/* lock for finding the next worker thread to queue on */
spinlock_t lock;
@@ -98,4 +99,5 @@ int btrfs_start_workers(struct btrfs_workers *workers, int num_workers);
int btrfs_stop_workers(struct btrfs_workers *workers);
void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max);
int btrfs_requeue_work(struct btrfs_work *work);
+void btrfs_set_work_high_prio(struct btrfs_work *work);
#endif
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index fec18b4..a6b8374 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -579,6 +579,10 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
async->bio_flags = bio_flags;
atomic_inc(&fs_info->nr_async_submits);
+
+ if (rw & (1 << BIO_RW_SYNCIO))
+ btrfs_set_work_high_prio(&async->work);
+
btrfs_queue_worker(&fs_info->workers, &async->work);
#if 0
int limit = btrfs_async_submit_limit(fs_info);
@@ -656,6 +660,7 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
}
+
/*
* kthread helpers are used to submit writes so that checksumming
* can happen in parallel across all CPUs
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 483b672..5d66cb2 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2501,7 +2501,7 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
};
struct writeback_control wbc_writepages = {
.bdi = wbc->bdi,
- .sync_mode = WB_SYNC_NONE,
+ .sync_mode = wbc->sync_mode,
.older_than_this = NULL,
.nr_to_write = 64,
.range_start = page_offset(page) + PAGE_CACHE_SIZE,
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 9c9fb46..e21c006 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1131,7 +1131,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
if (will_write) {
btrfs_fdatawrite_range(inode->i_mapping, pos,
pos + write_bytes - 1,
- WB_SYNC_NONE);
+ WB_SYNC_ALL);
} else {
balance_dirty_pages_ratelimited_nr(inode->i_mapping,
num_pages);
generated by cgit v1.1 at 2024-12-26 11:04:21 +0000