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block: doc: add slice_idle_us to bfq documentation 

Of the tunables available for the bfq I/O scheduler, the only one
missing from the documentation in 'Documentation/block/bfq-iosched.txt'
is slice_idle_us. Add this tunable to the documentation and a short
explanation of its purpose.

Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
John Pittman 2019-01-08 16:56:13 -05:00 committed by Jens Axboe
parent 40405851af
commit 47cb393ee4
1 changed files with 7 additions and 0 deletions
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7
Documentation/block/bfq-iosched.txt
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@ -357,6 +357,13 @@ video playing/streaming, a very low drop rate may be more important
than maximum throughput. In these cases, consider setting the
strict_guarantees parameter.
slice_idle_us
-------------
Controls the same tuning parameter as slice_idle, but in microseconds.
Either tunable can be used to set idling behavior. Afterwards, the
other tunable will reflect the newly set value in sysfs.
strict_guarantees
-----------------