[roll] Roll fuchsia [kernel][vm] Back split bits w/ a share count

Add a share count field to pages and back split bits with it.

Also add some opaque metadata storage to the compression system. The
caller is able to update the metadata for a page anytime, including
while compression is in-progress or the page is compressed and bound
to a reference. When compression produces a page for the caller (via
Decompress, MoveReference, or Compress failure) it will return the
most updated version of the caller-supplied metadata.

VmCowPages uses this metadata storage to preserve the share count across
Page<->Reference conversions.

No functional change.

Test: compression_unittests
Original-Bug: 42058561
Original-Bug: 338300808
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1068495
Original-Revision: c3fb81b6fe9ceecedc00dfaef2a6f6a6b438f6b4
GitOrigin-RevId: 904e5b33a84bf92138ffacb660ca0e4b1fcdd3d0
Change-Id: I5d8310a3eb9d54a8ec663345d7e62fb6a1342611
1 file changed
tree: 455fcdb6cf497bf005fc72771ed9a1bc8f76ba59
  1. ctf/
  2. git-hooks/
  3. infra/
  4. third_party/
  5. cts
  6. firmware
  7. flower
  8. jiri.lock
  9. MILESTONE
  10. minimal
  11. prebuilts
  12. README.md
  13. stem
  14. test_durations
  15. toolchain
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.