[pypy-commit] pypy default: document branch

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r90589:9e10b6b82ebf
Date: 2017-03-08 14:53 +0100
http://bitbucket.org/pypy/pypy/changeset/9e10b6b82ebf/

Log:	document branch

diff --git a/pypy/doc/whatsnew-head.rst b/pypy/doc/whatsnew-head.rst
--- a/pypy/doc/whatsnew-head.rst
+++ b/pypy/doc/whatsnew-head.rst
@@ -180,3 +180,10 @@
 Improve the optimization of branchy Python code by retaining more
 information across failing guards. This is done by appending some
 carefully encoded extra information into the resume code.
+
+.. branch: shadowstack-perf-2
+
+Two changes that together bring the performance of shadowstack close to
+asmgcc---close enough that we can now make shadowstack the default even
+on Linux.  This should remove a whole class of rare bugs introduced by
+asmgcc.