Date: Tue, 16 Feb 2016 10:33:42 -0600 (CST) From: Christoph Lameter <cl@...ux.com> To: Laura Abbott <labbott@...oraproject.org> cc: Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>, Joonsoo Kim <js1304@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com, Kees Cook <keescook@...omium.org> Subject: Re: [PATCHv2 4/4] slub: Relax CMPXCHG consistency restrictions On Mon, 15 Feb 2016, Laura Abbott wrote: > When debug options are enabled, cmpxchg on the page is disabled. This is > because the page must be locked to ensure there are no false positives > when performing consistency checks. Some debug options such as poisoning > and red zoning only act on the object itself. There is no need to > protect other CPUs from modification on only the object. Allow cmpxchg > to happen with poisoning and red zoning are set on a slab. Acked-by: Christoph Lameter <cl@...ux.com>
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