From: Christoph Lameter <cl@linux.com>
To: Laura Abbott <labbott@fedoraproject.org>
Cc: Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <js1304@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-hardening@lists.openwall.com,
Kees Cook <keescook@chromium.org>
Subject: Re: [PATCHv2 4/4] slub: Relax CMPXCHG consistency restrictions
Date: Tue, 16 Feb 2016 10:33:42 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.20.1602161033260.4158@east.gentwo.org> (raw)
In-Reply-To: <1455561864-4217-5-git-send-email-labbott@fedoraproject.org>
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@linux.com>
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next prev parent reply other threads:[~2016-02-16 16:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 18:44 [PATCHv2 0/4] Improve performance for SLAB_POISON Laura Abbott
2016-02-15 18:44 ` [PATCHv2 1/4] slub: Drop lock at the end of free_debug_processing Laura Abbott
2016-02-16 16:28 ` Christoph Lameter
2016-02-24 14:22 ` Paolo Bonzini
2016-02-24 18:09 ` Laura Abbott
2016-02-15 18:44 ` [PATCHv2 2/4] slub: Fix/clean free_debug_processing return paths Laura Abbott
2016-02-16 16:30 ` Christoph Lameter
2016-02-15 18:44 ` [PATCHv2 3/4] slub: Convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS Laura Abbott
2016-02-16 16:32 ` Christoph Lameter
2016-02-15 18:44 ` [PATCHv2 4/4] slub: Relax CMPXCHG consistency restrictions Laura Abbott
2016-02-16 16:33 ` Christoph Lameter [this message]
2016-02-18 8:39 ` [PATCHv2 0/4] Improve performance for SLAB_POISON Joonsoo Kim
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