[roll] Roll fuchsia [kernel][vm] InitShared does not eagerly set AF

When populating the top level page table entries in the shared aspace,
leave the non-terminal AF bit unset. This allows the faulting path to
set the AF bit only when a top level page table is actually accessed (as
is the case with non-shared aspaces).

This avoids wasted work during accessed bit harvesting; we no longer
need to recurse into *all* top level page tables in the shared aspace.
Experimentation shows that only one top level page table was ever being
populated / accessed.

Less overall time spent harvesting the shared aspace means less time
under contention for the shared aspace lock.

Original-Bug: 483687771
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1528104
Original-Revision: 69a5719e4eaf49524b366e35df14d6f05a8a754c
GitOrigin-RevId: 3e55bffa125cf90ad18a4054cce1cb75ba672850
Change-Id: I1b9884287999ceb8d63df15912c8599058da7f40
1 file changed
tree: fb7b89d7a08830aa41d3b5452b9f4bad543ed7a6
  1. ctf/
  2. git-hooks/
  3. infra/
  4. third_party/
  5. cobalt
  6. flower
  7. jiri.lock
  8. MILESTONE
  9. minimal
  10. prebuilts
  11. README.md
  12. stem
  13. test_durations
README.md

Integration

This repository contains Fuchsia's Global Integration manifest files.

Making changes

All changes should be made to the internal version of this repository. Our infrastructure automatically updates this version when the internal one changes.

Currently all changes must be made by a Google employee. Non-Google employees wishing to make a change can ask for assistance in one of the communication channels documented at get involved.

Obtaining the source

First install Jiri.

Next run:

$ jiri init
$ jiri import minimal https://fuchsia.googlesource.com/integration
$ jiri update

Third party

Third party projects should have their own subdirectory in ./third_party.