From: Christoph Lameter <cl@linux.com>
To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Pekka Enberg <penberg@kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>,
Sasha Levin <sasha.levin@oracle.com>,
Dmitry Chernenkov <dmitryc@google.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] slub memory quarantine
Date: Tue, 3 Mar 2015 10:42:07 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.11.1503031041340.14643@gentwo.org> (raw)
In-Reply-To: <54F5D5CC.6070901@samsung.com>
On Tue, 3 Mar 2015, Andrey Ryabinin wrote:
> On 03/03/2015 12:10 PM, Dmitry Vyukov wrote:
> > Please hold on with this.
> > Dmitry Chernenkov is working on a quarantine that works with both slub
> > and slab, does not cause spurious OOMs and does not depend on
> > slub-debug which has unacceptable performance (acquires global lock).
>
> I think that it's a separate issue. KASan already depend on slub_debug - it required for redzones/user tracking.
> I think that some parts slub debugging (like user tracking and this quarantine)
> could be moved (for CONFIG_KASAN=y) to the fast path without any locking.
In general these features need to be ifdeffed out since they add
significant overhead for the data structures and execution paths.
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next prev parent reply other threads:[~2015-03-03 16:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 8:55 Andrey Ryabinin
2015-03-03 9:10 ` Dmitry Vyukov
2015-03-03 15:39 ` Andrey Ryabinin
2015-03-03 16:42 ` Christoph Lameter [this message]
2015-03-03 17:36 ` Dmitry Chernenkov
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