diff options
Diffstat (limited to 'kernel/async.c')
| -rw-r--r-- | kernel/async.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/kernel/async.c b/kernel/async.c index 97f224a525..4c3e6a4459 100644 --- a/kernel/async.c +++ b/kernel/async.c @@ -64,6 +64,7 @@ static async_cookie_t next_cookie = 1; static LIST_HEAD(async_global_pending); /* pending from all registered doms */ static ASYNC_DOMAIN(async_dfl_domain); static DEFINE_SPINLOCK(async_lock); +static struct workqueue_struct *async_wq; struct async_entry { struct list_head domain_list; @@ -174,7 +175,7 @@ static async_cookie_t __async_schedule_node_domain(async_func_t func, spin_unlock_irqrestore(&async_lock, flags); /* schedule for execution */ - queue_work_node(node, system_unbound_wq, &entry->work); + queue_work_node(node, async_wq, &entry->work); return newcookie; } @@ -345,3 +346,17 @@ bool current_is_async(void) return worker && worker->current_func == async_run_entry_fn; } EXPORT_SYMBOL_GPL(current_is_async); + +void __init async_init(void) +{ + /* + * Async can schedule a number of interdependent work items. However, + * unbound workqueues can handle only upto min_active interdependent + * work items. The default min_active of 8 isn't sufficient for async + * and can lead to stalls. Let's use a dedicated workqueue with raised + * min_active. + */ + async_wq = alloc_workqueue("async", WQ_UNBOUND, 0); + BUG_ON(!async_wq); + workqueue_set_min_active(async_wq, WQ_DFL_ACTIVE); +} |