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Differential D27858

rctl(4): support throttling resource usage to 0
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Authored by jah on Dec 30 2020, 11:49 PM.
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trasz
kib
mjg
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rGe8a5a1ad7154: rctl(4): support throttling resource usage to 0
Summary

For rate-based resources that support throttling (e.g.
readiops/writeips), this fixes a divide-by-zero panic when rctl(8)
passes 0 as the throttle value. For these resources, treat
zero-throttle requests as requests to suspend forward progress as long
as possible using the duration specified in
kern.racct.rctl.throttle_max.

PR: 251803
Reported by: chris@cretaforce.gr
MFC after: 1 week

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rS FreeBSD src repository - subversion
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Buildable 35809
Build 32698: arc lint + arc unit

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sys/
kern/
5 lines

Diff 81396

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sys/kern/kern_rctl.c

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