6f27a216b4
On Linux, both mprotect() and mmap() acquire the mmap_lock (in writer mode), posing scalability challenges. The mmap_lock (formerly called mmap_sem) is a reader/writer lock that controls access to a process's address space; before making changes there (mapping in a new range, for example), the kernel must acquire that lock. Page-fault handling must also acquire mmap_lock (in reader mode) to ensure that the address space doesn't change in surprising ways while a fault is being resolved. A process can have a large address space and many threads running (and incurring page faults) concurrently, turning mmap_lock into a significant bottleneck. While both mmap() and mprotect() are protected by the mmap_lock, the shorter duration of mprotect system call, due to their simpler nature, results in a reduced locking time for the mmap_lock. |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| codereview.cfg | ||
| CONTRIBUTING.md | ||
| go.env | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| SECURITY.md | ||
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 4.0 Attributions license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Download and Install
Binary Distributions
Official binary distributions are available at https://go.dev/dl/.
After downloading a binary release, visit https://go.dev/doc/install for installation instructions.
Install From Source
If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.
Contributing
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.