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| author | Bhaktipriya Shridhar <bhaktipriya96@gmail.com> | 2016-07-16 10:48:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-07-18 10:17:21 +0200 |
| commit | 7b1058bc59ac24eb01e259749e8655fb884aa711 (patch) | |
| tree | 3606d57eb01a0c82004d3faf86a4c6e898fe7d46 /arch/s390 | |
| parent | s390/chsc: improve channel path descriptor determination (diff) | |
| download | linux-7b1058bc59ac24eb01e259749e8655fb884aa711.tar.xz linux-7b1058bc59ac24eb01e259749e8655fb884aa711.zip | |
s390/cio/chp : Remove deprecated create_singlethread_workqueue
The workqueue "chp_wq" is involved in performing pending
configure tasks for channel paths.
It has a single work item(&cfg_work) and hence doesn't require
ordering. Also, it is not being used on a memory reclaim path.
Hence, the singlethreaded workqueue has been replaced with the use of
system_wq.
System workqueues have been able to handle high level of concurrency
for a long time now and hence it's not required to have a singlethreaded
workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
created with create_singlethread_workqueue(), system_wq allows multiple
work items to overlap executions even on the same CPU; however, a
per-cpu workqueue doesn't have any CPU locality or global ordering
guarantee unless the target CPU is explicitly specified and thus the
increase of local concurrency shouldn't make any difference.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
0 files changed, 0 insertions, 0 deletions