e6dacf91ff
This CL adds two related features enabled by default via compatibility GODEBUGs containermaxprocs and updatemaxprocs. On Linux, containermaxprocs makes the Go runtime consider cgroup CPU bandwidth limits (quota/period) when setting GOMAXPROCS. If the cgroup limit is lower than the number of logical CPUs available, then the cgroup limit takes precedence. On all OSes, updatemaxprocs makes the Go runtime periodically recalculate the default GOMAXPROCS value and update GOMAXPROCS if it has changed. If GOMAXPROCS is set manually, this update does not occur. This is intended primarily to detect changes to cgroup limits, but it applies on all OSes because the CPU affinity mask can change as well. The runtime only considers the limit in the leaf cgroup (the one that actually contains the process), caching the CPU limit file descriptor(s), which are periodically reread for updates. This is a small departure from the original proposed design. It will not consider limits of parent cgroups (which may be lower than the leaf), and it will not detection cgroup migration after process start. We can consider changing this in the future, but the simpler approach is less invasive; less risk to packages that have some awareness of runtime internals. e.g., if the runtime periodically opens new files during execution, file descriptor leak detection is difficult to implement in a stable way. For #73193. Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest Change-Id: I6a6a636c631c1ae577fb8254960377ba91c5dc98 Reviewed-on: https://go-review.googlesource.com/c/go/+/670497 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> |
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README.md
Release Notes
The initial and next subdirectories of this directory are for release notes.
For developers
Release notes should be added to next by editing existing files or creating
new files. Do not add RELNOTE=yes comments in CLs. Instead, add a file to
the CL (or ask the author to do so).
At the end of the development cycle, the files will be merged by being concatenated in sorted order by pathname. Files in the directory matching the glob "*stdlib/*minor" are treated specially. They should be in subdirectories corresponding to standard library package paths, and headings for those package paths will be generated automatically.
Files in this repo's api/next directory must have corresponding files in
doc/next/*stdlib/*minor.
The files should be in the subdirectory for the package with the new
API, and should be named after the issue number of the API proposal.
For example, if the directory 6-stdlib/99-minor is present,
then an api/next file with the line
pkg net/http, function F #12345
should have a corresponding file named doc/next/6-stdlib/99-minor/net/http/12345.md.
At a minimum, that file should contain either a full sentence or a TODO,
ideally referring to a person with the responsibility to complete the note.
If your CL addresses an accepted proposal, mention the proposal issue number in
your release note in the form /issue/NUMBER. A link to the issue in the text
will have this form (see below). If you don't want to mention the issue in the
text, add it as a comment:
<!-- go.dev/issue/12345 -->
If an accepted proposal is mentioned in a CL but not in the release notes, it will be flagged as a TODO by the automated tooling. That is true even for proposals that add API.
Use the following forms in your markdown:
[http.Request] # symbol documentation; auto-linked as in Go doc strings
[Request] # short form, for symbols in the package being documented
[net/http] # package link
[#12345](/issue/12345) # GitHub issues
[CL 6789](/cl/6789) # Gerrit changelists
To preview next content in merged form using a local instance of the website, run:
go run golang.org/x/website/cmd/golangorg@latest -goroot=..
Then open http://localhost:6060/doc/next. Refresh the page to see your latest edits.
For the release team
The relnote tool, at golang.org/x/build/cmd/relnote, operates on the files
in doc/next.
As a release cycle nears completion, run relnote todo to get a list of
unfinished release note work.
To prepare the release notes for a release, run relnote generate.
That will merge the .md files in next into a single file.
Atomically (as close to it as possible) add that file to _content/doc directory
of the website repository and remove the doc/next directory in this repository.
To begin the next release development cycle, populate the contents of next
with those of initial. From the repo root:
> cd doc
> cp -R initial/ next
Then edit next/1-intro.md to refer to the next version.