diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man9/taskqueue.9 | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/share/man/man9/taskqueue.9 b/share/man/man9/taskqueue.9 index 33f616b..475d06a 100644 --- a/share/man/man9/taskqueue.9 +++ b/share/man/man9/taskqueue.9 @@ -65,6 +65,8 @@ struct task { .Fn taskqueue_enqueue_fast "struct taskqueue *queue" "struct task *task" .Ft void .Fn taskqueue_run "struct taskqueue *queue" +.Ft void +.Fn taskqueue_run_fast "struct taskqueue *queue" .Fn TASK_INIT "struct task *task" "int priority" "task_fn_t *func" "void *context" .Fn TASKQUEUE_DECLARE "name" .Fn TASKQUEUE_DEFINE "name" "taskqueue_enqueue_fn enqueue" "void *context" "init" @@ -131,7 +133,10 @@ interrupt context. .Pp To execute all the tasks on a queue, call -.Fn taskqueue_run . +.Fn taskqueue_run +or +.Fn taskqueue_run_fast +depending on the flavour of the queue. When a task is executed, first it is removed from the queue, the value of @@ -194,20 +199,38 @@ is defined which contains the kernel thread serving the tasks. The variable .Vt struct taskqueue *taskqueue_name is used to enqueue tasks onto the queue. -.Pp -The system provides three global taskqueues, +.Ss Predefined Task Queues +The system provides four global taskqueues, +.Va taskqueue_fast , .Va taskqueue_swi , .Va taskqueue_swi_giant , and .Va taskqueue_thread . +The +.Va taskqueue_fast +queue is for swi handlers dispatched from fast interrupt handlers, +where sleep mutexes cannot be used. The swi taskqueues are run via a software interrupt mechanism. -The taskqueue_swi queue runs without the protection of the Giant kernel lock, -and the taskqueue_swi_giant queue runs with the protection of the Giant +The +.Va taskqueue_swi +queue runs without the protection of the +.Va Giant +kernel lock, and the +.Va taskqueue_swi_giant +queue runs with the protection of the +.Va Giant +kernel lock. +The thread taskqueue +.Va taskqueue_thread +runs in a kernel thread context, and tasks run from this thread do +not run under the +.Va Giant kernel lock. -The thread taskqueue runs in a kernel thread context, and tasks run from -this thread do not run under the Giant kernel lock. -If the caller wants to run under Giant, he should explicitly acquire and -release Giant in his taskqueue handler routine. +If the caller wants to run under +.Va Giant , +he should explicitly acquire and release +.Va Giant +in his taskqueue handler routine. .Pp To use these queues, call @@ -218,6 +241,10 @@ use .Va taskqueue_swi_giant , or .Va taskqueue_thread ) . +Use +.Fn taskqueue_enqueue_fast +for the global taskqueue variable +.Va taskqueue_fast . .Pp The software interrupt queues can be used, for instance, for implementing interrupt handlers which must perform a @@ -242,3 +269,6 @@ There is a similar facility called tqueue in the Linux kernel. .Sh AUTHORS This man page was written by .An Doug Rabson . +.Sh BUGS +There is no +.Fn taskqueue_create_fast . |
