[roll] Roll fuchsia [kernel][vm] Share count zero markers

Add a share count to zero markers. There is currently a case where a
zero marker that is not referenced by any cow pages can remain in a
page list.

If a cow pages has a parent, a zero marker, is cloned, then all it's
children modify the zero page there is no way of knowing that the marker
is no longer referenced by any cow pages.

This CL introduces a share counter so that when it is decremented from
zero, it can be dropped.

Original-Bug: 435564091
Run-All-Tests: True
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1284204
Original-Revision: 409085f1e1383c1fb3676d1e48f22a5665b19317
GitOrigin-RevId: b32d581dbabb9a4971dfde4187bd46466fb7a953
Change-Id: I3e52a1c630941683ac329fe1fd7eabd15e73f811
1 file changed
tree: 3a7a8edc00a707b78ef463a39a3ce756646f4031
  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.