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delayacct: Document task_delayacct sysctl

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Update sysctl/kernel.rst.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210512114035.GH3672@suse.de
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Mel Gorman 2021-05-12 12:40:35 +01:00 committed by Peter Zijlstra
parent 90a0ff4ec9
commit fcb5017045
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Documentation/admin-guide/sysctl/kernel.rst
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@ -1087,6 +1087,13 @@ Model available). If your platform happens to meet the
requirements for EAS but you do not want to use it, change
this value to 0.
task_delayacct
===============
Enables/disables task delay accounting (see
:doc:`accounting/delay-accounting.rst`). Enabling this feature incurs
a small amount of overhead in the scheduler but is useful for debugging
and performance tuning. It is required by some tools such as iotop.
sched_schedstats
================