[roll] Roll fuchsia [kernel][brwlock] Add optimistic spin phase to BrwLock.

Add a spin phase to BrwLock, similar to Mutex, to avoid the overhead and
latency of blocking too soon when the system is heavily loaded. Blocking
too early can cause significant delays when there is heavy handle table
contention and significant CPU load.

Original-Bug: b/242564647
Original-Bug: b/234776870
Test: Observe blocking is eliminated in most handle table contention.
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/720204
Original-Revision: 248bac8303a3be51e5a0849c3662de5bb884d323
GitOrigin-RevId: df435a0c60834fd65a8892ef0257e5a6e1b983c7
Change-Id: Ie30f079b1d257c4865fcb027b2b11a10b9975da0
1 file changed
tree: edc2401d5cb1c85733747eba523011e012f0d12f
  1. git-hooks/
  2. infra/
  3. third_party/
  4. cts
  5. firmware
  6. flower
  7. jiri.lock
  8. minimal
  9. prebuilts
  10. README.md
  11. stem
  12. test_durations
  13. 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 via the IRC channel #fuchsia on Freenode.

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.