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| author | Tejun Heo <tj@kernel.org> | 2010-06-29 10:07:12 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-06-29 10:07:12 +0200 |
| commit | affee4b294a0fc97d67c8a77dc080c4dd262a79e (patch) | |
| tree | 5b3fd79640ad7940e0abbed193a192d3919f259d /include/linux/workqueue.h | |
| parent | c34056a3fdde777c079cc8a70785c2602f2586cb (diff) | |
| download | lwn-affee4b294a0fc97d67c8a77dc080c4dd262a79e.tar.gz lwn-affee4b294a0fc97d67c8a77dc080c4dd262a79e.zip | |
workqueue: reimplement work flushing using linked works
A work is linked to the next one by having WORK_STRUCT_LINKED bit set
and these links can be chained. When a linked work is dispatched to a
worker, all linked works are dispatched to the worker's newly added
->scheduled queue and processed back-to-back.
Currently, as there's only single worker per cwq, having linked works
doesn't make any visible behavior difference. This change is to
prepare for multiple shared workers per cpu.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/workqueue.h')
| -rw-r--r-- | include/linux/workqueue.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index 8762f62103d8..4f4fdba722c3 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -24,8 +24,9 @@ typedef void (*work_func_t)(struct work_struct *work); enum { WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */ + WORK_STRUCT_LINKED_BIT = 1, /* next work is linked to this one */ #ifdef CONFIG_DEBUG_OBJECTS_WORK - WORK_STRUCT_STATIC_BIT = 1, /* static initializer (debugobjects) */ + WORK_STRUCT_STATIC_BIT = 2, /* static initializer (debugobjects) */ WORK_STRUCT_COLOR_SHIFT = 3, /* color for workqueue flushing */ #else WORK_STRUCT_COLOR_SHIFT = 2, /* color for workqueue flushing */ @@ -34,6 +35,7 @@ enum { WORK_STRUCT_COLOR_BITS = 4, WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT, + WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT, #ifdef CONFIG_DEBUG_OBJECTS_WORK WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT, #else |