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Austin Clements 9745e88b22 runtime: use rwmutex for execLock
Currently the execLock is a mutex, which has the unfortunate
side-effect of serializing all thread creation. This replaces it with
an rwmutex so threads can be created in parallel, but exec still
blocks thread creation.

Fixes #20738.

Change-Id: Ia8f30a92053c3d28af460b0da71176abe5fd074b
Reviewed-on: https://go-review.googlesource.com/47072
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-06-28 22:08:59 +00:00
.github doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
api api: promote next to go1.9 2017-06-14 21:07:10 +00:00
doc doc: document the state of NetBSD in the Go 1.9 release notes 2017-06-28 20:43:39 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc cmd/cgo: unwrap typedef-chains before type checking 2017-06-27 23:02:34 +00:00
src runtime: use rwmutex for execLock 2017-06-28 22:08:59 +00:00
test cmd/compile: fix slice-in-bound check on amd64p32 2017-06-28 16:20:53 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore .gitignore: change path to zbootstrap.go 2017-04-19 02:13:58 +00:00
AUTHORS A+C: updated update 2017-06-20 23:27:06 +00:00
CONTRIBUTING.md doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
CONTRIBUTORS A+C: updated update 2017-06-20 23:27:06 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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