Commit 015fcf13 authored by Gioh Kim's avatar Gioh Kim Committed by Jens Axboe
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Documentation/ABI/rnbd-clt: Add description for nr_poll_queues 



describe how to set nr_poll_queues and enable the polling

Signed-off-by: default avatarGioh Kim <gi-oh.kim@ionos.com>
Acked-by: default avatarJack Wang <jinpu.wang@cloud.ionos.com>
Link: https://lore.kernel.org/r/20210419073722.15351-15-gi-oh.kim@ionos.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 2958a995

Documentation/ABI/testing/sysfs-block-rnbd

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@@ -56,3 +56,9 @@ Date: Feb 2020 
KernelVersion:	5.7

Contact:	Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>

Description:	Remap the disconnected device if the session is not destroyed yet.



What:		/sys/block/rnbd<N>/rnbd/nr_poll_queues

Date:		Feb 2020

KernelVersion:	5.7

Contact:	Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>

Description:	Contains the number of poll-mode queues

Documentation/ABI/testing/sysfs-class-rnbd-client

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@@ -85,6 +85,19 @@ Description: Expected format is the following:: 


		By default "rw" is used.



		nr_poll_queues

		  specifies the number of poll-mode queues. If the IO has HIPRI flag,

		  the block-layer will send the IO via the poll-mode queue.

		  For fast network and device the polling is faster than interrupt-base

		  IO handling because it saves time for context switching, switching to

		  another process, handling the interrupt and switching back to the

		  issuing process.



		  Set -1 if you want to set it as the number of CPUs

		  By default rnbd client creates only irq-mode queues.



		  NOTICE: MUST make a unique session for a device using the poll-mode queues.



		Exit Codes:



		If the device is already mapped it will fail with EEXIST. If the input