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IB/srp: Make queue size configurable

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Certain storage configurations, e.g. a sufficiently large array of
hard disks in a RAID configuration, need a queue depth above 64 to
achieve optimal performance. Hence make the queue depth configurable.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Tested-by: Jack Wang <xjtuwjp@gmail.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Bart Van Assche
2013-10-26 14:40:37 +02:00
committed by Roland Dreier
parent b81d00bddf
commit 4d73f95f70
3 changed files with 107 additions and 39 deletions
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Documentation/ABI/stable/sysfs-driver-ib_srp
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@@ -63,6 +63,10 @@ Description: Interface for making ib_srp connect to a new target.
over multiple CPU's.
* tl_retry_count, a number in the range 2..7 specifying the
IB RC retry count.
* queue_size, the maximum number of commands that the
initiator is allowed to queue per SCSI host. The default
value for this parameter is 62. The lowest supported value
is 2.
What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev
Date: January 2, 2006