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Differential D34365

cam: add hw.cam.iosched.read_bias
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Authored by imp on Feb 24 2022, 12:20 AM.
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chs
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cam
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rGd592c0db8ba7: cam: add hw.cam.iosched.read_bias
Summary

Allow a global setting for the read_bias for the dynamic io
scheduler. This allows global policy to be set, in addition to the
existing per-drive policy. kern.cam.iosched.read_bias is a new tunable.

Sponsored by: Netflix

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rG FreeBSD src repository
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Event Timeline

imp created this revision.Feb 24 2022, 12:20 AM
Herald added a reviewer: cam. · View Herald TranscriptFeb 24 2022, 12:20 AM
imp requested review of this revision.Feb 24 2022, 12:20 AM
Harbormaster completed remote builds in B44561: Diff 103186.Feb 24 2022, 12:20 AM
imp added a reviewer: chs.Feb 24 2022, 12:21 AM
chs accepted this revision.Feb 24 2022, 12:50 AM
chs added inline comments.
sys/cam/cam_iosched.c
1246

this "val" parameter isn't used if the "ptr" parameter immediate before it is non-NULL, so you might as well just leave val 0 here.

This revision is now accepted and ready to land.Feb 24 2022, 12:50 AM
Closed by commit rGd592c0db8ba7: cam: add hw.cam.iosched.read_bias (authored by imp). · Explain WhyMay 1 2022, 5:29 PM
This revision was automatically updated to reflect the committed changes.
imp added a commit: rGd592c0db8ba7: cam: add hw.cam.iosched.read_bias.

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sys/
cam/
13 lines

Diff 105621

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sys/cam/cam_iosched.c

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