Am Dienstag, 23. Februar 2016, 14:32:43 schrieb Mathieu Desnoyers: Hi Mathieu,
> ----- On Feb 23, 2016, at 9:23 AM, Paul E. McKenney [email protected] wrote: > > On Tue, Feb 23, 2016 at 02:02:26PM +0000, Mathieu Desnoyers wrote: > >> commit 7829fb09a2b4268b30dd9bc782fa5ebee278b137 > >> Author: Daniel Borkmann <[email protected]> > >> Date: Thu Apr 30 04:13:52 2015 +0200 > >> > >> lib: make memzero_explicit more robust against dead store elimination > >> > >> ^ interesting commit. Any idea on the impact of this on kernel RCU > >> implementation and liburcu cmm_barrier() ? > > > > First I knew of it! But I bet that more like this are needed. ;-) > > I recommend you check my IRC discussion with peterz on the matter of > this new "barrier_data()". > The key idea of the memzero_explicit is about forcing the compiler to do a memset. See the trivial test attached. Ciao Stephan
memset_secure.c.xz
Description: application/xz
