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| author | Tejun Heo <tj@kernel.org> | 2010-06-29 10:07:14 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-06-29 10:07:14 +0200 |
| commit | dcd989cb73ab0f7b722d64ab6516f101d9f43f88 (patch) | |
| tree | 8c2f14e708367cb67dd9d29f2da0f7e5f454cf31 /include/linux/workqueue.h | |
| parent | d320c03830b17af64e4547075003b1eeb274bc6c (diff) | |
| download | linux-stable-dcd989cb73ab0f7b722d64ab6516f101d9f43f88.tar.gz linux-stable-dcd989cb73ab0f7b722d64ab6516f101d9f43f88.tar.bz2 linux-stable-dcd989cb73ab0f7b722d64ab6516f101d9f43f88.zip | |
workqueue: implement several utility APIs
Implement the following utility APIs.
workqueue_set_max_active() : adjust max_active of a wq
workqueue_congested() : test whether a wq is contested
work_cpu() : determine the last / current cpu of a work
work_busy() : query whether a work is busy
* Anton Blanchard fixed missing ret initialization in work_busy().
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Anton Blanchard <anton@samba.org>
Diffstat (limited to 'include/linux/workqueue.h')
| -rw-r--r-- | include/linux/workqueue.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index 48b7422f25ae..0a7f79729380 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -61,6 +61,10 @@ enum { WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1, WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK, WORK_STRUCT_NO_CPU = NR_CPUS << WORK_STRUCT_FLAG_BITS, + + /* bit mask for work_busy() return values */ + WORK_BUSY_PENDING = 1 << 0, + WORK_BUSY_RUNNING = 1 << 1, }; struct work_struct { @@ -307,9 +311,14 @@ extern void init_workqueues(void); int execute_in_process_context(work_func_t fn, struct execute_work *); extern int flush_work(struct work_struct *work); - extern int cancel_work_sync(struct work_struct *work); +extern void workqueue_set_max_active(struct workqueue_struct *wq, + int max_active); +extern bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq); +extern unsigned int work_cpu(struct work_struct *work); +extern unsigned int work_busy(struct work_struct *work); + /* * Kill off a pending schedule_delayed_work(). Note that the work callback * function may still be running on return from cancel_delayed_work(), unless |