diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-12-01 03:21:24 +0100 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-12-14 12:50:12 +0100 |
| commit | beb55a0cc15a43be43a646b588fcf83822f0c44f (patch) | |
| tree | 4ad60fa940e13870449e70341b036e5eaa22c01c | |
| parent | target: Remove extra se_device->execute_task_lock access in fast path (diff) | |
| download | linux-beb55a0cc15a43be43a646b588fcf83822f0c44f.tar.xz linux-beb55a0cc15a43be43a646b588fcf83822f0c44f.zip | |
target: Remove __transport_execute_tasks() for each processing context
This patch removes the original usage of __transport_execute_tasks() ahead
of every transport_get_cmd_from_queue() call in transport_processing_thread().
This helps reduce se_device->execute_task_lock contention between qla2xxx wq
with target_submit_cmd() for READs and transport_processing_thread()
context servicing WRITEs with full payloads for I/O submission.
It also adds a __transport_execute_tasks() to kick the task queue again
without a *se_cmd descriptor with existing queue full logic, but this may
end up not being necessary.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/target_core_transport.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 46e25118ab25..373e01f523dd 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -4655,8 +4655,6 @@ static int transport_processing_thread(void *param) goto out; get_cmd: - __transport_execute_tasks(dev, NULL); - cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); if (!cmd) continue; |