Switch nda(4) to be the default NVMe direct access driver
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Authored by kbowling on Aug 8 2018, 2:56 AM.

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cem

jhibbits

Details

Reviewers

imp

Group Reviewers

PowerPC

Summary

Switch to the cam(4) based nda(4) direct access driver in time for FreeBSD 12.0. This driver has been used extensively at Netflix and LLNW. I've also tested it on ppc64.

Test Plan

Apply the patch on a system using nvd(4), on x86 it should reboot with the new nda(4) nodes functional and nvd device files aliased.

On ppc64 you will need to edit the kboot.conf.

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Repository

rS FreeBSD src repository - subversion

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Event Timeline

kbowling created this revision.Aug 8 2018, 2:56 AM

kbowling updated this revision to Diff 46394.Aug 8 2018, 3:06 AM

kbowling added inline comments.

sys/cam/nvme/nvme_da.c
822	Note for @imp I'm not sure what those issues were but maybe we avoid them by making nda default like this?

cem added a subscriber: cem.Aug 8 2018, 3:47 AM

kbowling added a subscriber: jhibbits.Aug 8 2018, 4:23 AM

kbowling added inline comments.

UPDATING
40	@jhibbits I didn't realize the nvd alias (see below, the note to Warner) was disabled. This comment might not be true if the alias is in place I will test.