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Differential D12337

cam iosched: Limit the quanta default to hz if it's below 200
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Authored by fk_fabiankeil.de on Sep 12 2017, 10:17 AM.
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emaste
imp
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rS323511: cam iosched: Limit the quanta default to hz if it's below 200
Summary

cam iosched: Limit the quanta default to hz if it's below 200

Previously the quanta default was always 200 while hz defaults
to 100 when running in a vm.

The cam_iosched_ticker() can't be scheduled more than once per tick
and some of the limiters depend on quanta matching the number of calls
per second to enforce the proper limits.

PR: 221953
Obtained from: ElectroBSD

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rS FreeBSD src repository - subversion
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fk_fabiankeil.de created this revision.Sep 12 2017, 10:17 AM
imp accepted this revision.Sep 12 2017, 10:48 PM

This looks good, but isn't the patch I expected from private email. I'll take a dry-run at committing it.

This revision is now accepted and ready to land.Sep 12 2017, 10:48 PM
Closed by commit rS323511: cam iosched: Limit the quanta default to hz if it's below 200 (authored by imp). · Explain WhySep 12 2017, 11:46 PM
This revision was automatically updated to reflect the committed changes.

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head/
sys/
cam/
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Diff 32995

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head/sys/cam/cam_iosched.c

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