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| author | Tejun Heo <tj@kernel.org> | 2013-04-01 11:23:38 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-04-01 11:23:38 -0700 |
| commit | d55262c4d164759a8debe772da6c9b16059dec47 (patch) | |
| tree | 2dffae0287567802a05e3290048195ea277d22ae /include/linux/workqueue.h | |
| parent | 4c16bd327c74d6678858706211a0c6e4e53eb3e6 (diff) | |
| download | talos-obmc-linux-d55262c4d164759a8debe772da6c9b16059dec47.tar.gz talos-obmc-linux-d55262c4d164759a8debe772da6c9b16059dec47.zip | |
workqueue: update sysfs interface to reflect NUMA awareness and a kernel param to disable NUMA affinity
Unbound workqueues are now NUMA aware. Let's add some control knobs
and update sysfs interface accordingly.
* Add kernel param workqueue.numa_disable which disables NUMA affinity
globally.
* Replace sysfs file "pool_id" with "pool_ids" which contain
node:pool_id pairs. This change is userland-visible but "pool_id"
hasn't seen a release yet, so this is okay.
* Add a new sysf files "numa" which can toggle NUMA affinity on
individual workqueues. This is implemented as attrs->no_numa whichn
is special in that it isn't part of a pool's attributes. It only
affects how apply_workqueue_attrs() picks which pools to use.
After "pool_ids" change, first_pwq() doesn't have any user left.
Removed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Diffstat (limited to 'include/linux/workqueue.h')
| -rw-r--r-- | include/linux/workqueue.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index 835d12b76960..717975639378 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -119,10 +119,15 @@ struct delayed_work { /* * A struct for workqueue attributes. This can be used to change * attributes of an unbound workqueue. + * + * Unlike other fields, ->no_numa isn't a property of a worker_pool. It + * only modifies how apply_workqueue_attrs() select pools and thus doesn't + * participate in pool hash calculations or equality comparisons. */ struct workqueue_attrs { int nice; /* nice level */ cpumask_var_t cpumask; /* allowed CPUs */ + bool no_numa; /* disable NUMA affinity */ }; static inline struct delayed_work *to_delayed_work(struct work_struct *work) |
