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Austin Clements 28f458ce5b runtime: eliminate unnecessary ragged barrier
The ragged barrier after entering the concurrent mark phase is
vestigial. This used to be the point where we enabled write barriers,
so it was necessary to synchronize all Ps to ensure write barriers
were enabled before any marking occurred. However, we've long since
switched to enabling write barriers during the concurrent scan phase,
so the start-the-world at the beginning of the concurrent scan phase
ensures that all Ps have enabled the write barrier.

Hence, we can eliminate the old "install write barrier" phase.

Fixes #11971.

Change-Id: I8cdcb84b5525cef19927d51ea11ba0a4db991ea8
Reviewed-on: https://go-review.googlesource.com/16044
Reviewed-by: Rick Hudson <rlh@golang.org>
2015-10-21 16:26:25 +00:00
api api: update next.txt 2015-10-12 23:00:00 +00:00
doc spec: remove "untyped bool" oxymorons 2015-10-20 22:08:17 +00:00
lib/time lib/time: update to IANA release 2015e. 2015-07-22 02:56:31 +00:00
misc cmd/internal/obj, runtime: add NOFRAME flag to suppress stack frame set up on ppc64x 2015-10-18 22:13:30 +00:00
src runtime: eliminate unnecessary ragged barrier 2015-10-21 16:26:25 +00:00
test cmd/compile: "invalid variable name x in type switch", where x is a name of a constant 2015-10-21 04:21:16 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore .gitignore: ignore y.output 2015-06-10 00:28:52 +00:00
AUTHORS A+C: automated updates 2015-09-10 00:59:04 +00:00
CONTRIBUTING.md doc: suggest security@golang.org for reporting security issues 2015-06-26 09:53:36 +00:00
CONTRIBUTORS C: Add Brian Gitonga Marete's Google email address (Google CLA). 2015-10-09 15:21:30 +00:00
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README.md readme: emphasize issue tracker is for bugs/proposals 2015-10-02 18:44:14 +00:00
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