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Documentation/ABI/rtrs-clt: Add descriptions for min-latency policy 

Describe new multipath policy min-latency of the RTRS client.

Link: https://lore.kernel.org/r/20210407113444.150961-5-gi-oh.kim@ionos.com
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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Gioh Kim 2021-04-07 13:34:44 +02:00 committed by Jason Gunthorpe
parent cc85392bcd
commit abdeef3b23
1 changed files with 12 additions and 0 deletions
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Documentation/ABI/testing/sysfs-class-rtrs-client
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@ -34,6 +34,9 @@ Description: Multipath policy specifies which path should be selected on each IO
min-inflight (1): min-inflight (1):
select path with minimum inflights. select path with minimum inflights.
min-latency (2):
select path with minimum latency.
What: /sys/class/rtrs-client/<session-name>/paths/ What: /sys/class/rtrs-client/<session-name>/paths/
Date: Feb 2020 Date: Feb 2020
KernelVersion: 5.7 KernelVersion: 5.7
@ -95,6 +98,15 @@ KernelVersion: 5.7
Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
Description: RO, Contains the destination address of the path Description: RO, Contains the destination address of the path
What: /sys/class/rtrs-client/<session-name>/paths/<src@dst>/cur_latency
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
Description: RO, Contains the latency time calculated by the heart-beat messages.
Whenever the client sends heart-beat message, it checks the time gap
between sending the heart-beat message and receiving the ACK.
This value can be changed regularly.
What: /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/reset_all What: /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/reset_all
Date: Feb 2020 Date: Feb 2020
KernelVersion: 5.7 KernelVersion: 5.7