Details

Reviewers

imp
jhb
kib
emaste
ziaee

Commits

rG58dd3aa31d17: arch.7: Add a section describing the user address space

Summary

Provide some details about the user address space on each platform.
Document platforms which support multiple address spaces. I didn't
include 32-bit ABIs here, but maybe I should.

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

markj created this revision.Apr 20 2025, 5:23 PM

Herald added a subscriber: ziaee. · View Herald TranscriptApr 20 2025, 5:23 PM

markj requested review of this revision.Apr 20 2025, 5:23 PM

Harbormaster completed remote builds in B63601: Diff 153967.Apr 20 2025, 5:23 PM

I love this!

share/man/man7/arch.7
231	The width fields should contain the first longest rendered item in the column.

Fix column widths.

Mention that the KERN_PROC_VM_LAYOUT sysctl can be used to get more info about
a particular process.

Harbormaster completed remote builds in B63603: Diff 153974.Apr 20 2025, 6:32 PM

kib added inline comments.Apr 20 2025, 6:36 PM

share/man/man7/arch.7
255	This text would need an editing after D49913
266	Why is this sentence put under riscv paragraph? It is a generic statement.

Re-order paragraphs.

Harbormaster completed remote builds in B63606: Diff 153977.Apr 20 2025, 6:46 PM

markj added inline comments.Apr 20 2025, 6:46 PM

share/man/man7/arch.7
255	Yes, I will keep this diff open until that one lands.

jhb added inline comments.Apr 21 2025, 6:25 PM

share/man/man7/arch.7
246

Document vm.pmap.prefer_uva_la48

Harbormaster completed remote builds in B63776: Diff 154473.Apr 29 2025, 2:21 PM

kib added inline comments.Apr 29 2025, 3:26 PM

share/man/man7/arch.7
248	I believe this should be .Xr sysctl 3
252
258	tunable can be used to force system into the 4-level paging mode, even if hardware supports 5-level paging. In particular, all processes would get 48bit AS.
268	Also proccontrol -m la48/la57 should be mentioned and cross-linked.