Differential D11825

Make nvd vs nda choice boot-time rather than build-time
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Authored by imp on Aug 2 2017, 6:48 PM.

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Reviewers

scottl
jimharris

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rS322036: Make nvd vs nda choice boot-time rather than build-time

Summary

Introduce hw.nvme.use_nvd tunable. This tunable allows both nvd and
nda to be installed in the kernel, while allowing only one of them to
create devices. This is an all-or-nothing setting, and you can't
change it after boot-time. However, it will allow easier A/B testing.

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Event Timeline

imp created this revision.Aug 2 2017, 6:48 PM

Harbormaster completed remote builds in B10812: Diff 31485.Aug 2 2017, 6:48 PM

imp added reviewers: scottl, jimharris.Aug 2 2017, 6:48 PM

Code all looks good. Just a couple of typos.

sys/dev/nvme/nvme_sysctl.c
38 ↗	(On Diff #31485)	NVMe is the typical abbreviation (lower case e).
40 ↗	(On Diff #31485)	deviecs => devices

This revision now requires changes to proceed.Aug 4 2017, 3:25 AM

Closed by commit rS322036: Make nvd vs nda choice boot-time rather than build-time (authored by imp). · Explain WhyAug 4 2017, 3:40 AM

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

head/

sys/

conf/

6 lines

2 lines

dev/

nvd/

5 lines

nvme/

2 lines

4 lines

6 lines

Diff 31551

head/sys/conf/files

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head/sys/conf/files.amd64

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head/sys/dev/nvd/nvd.c

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head/sys/dev/nvme/nvme.h

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head/sys/dev/nvme/nvme_sim.c

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head/sys/dev/nvme/nvme_sysctl.c

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