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Message-ID: <84144f020602030353j221f8ae5n7fd0d56b9585596b@mail.gmail.com>
Date: Fri, 3 Feb 2006 13:53:23 +0200
From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Manfred Spraul <manfred@colorfullife.com>
Subject: Re: [PATCH] slab leak detector (Was: Size-128 slab leak)
Cc: Andrew Morton <akpm@osdl.org>, kevin@koconnor.net,
       linux-kernel@vger.kernel.org, jgarzik@pobox.com
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References: <Pine.LNX.4.58.0602021021240.32240@sbz-30.cs.Helsinki.FI>
	 <20060202004415.28249549.akpm@osdl.org>
	 <43E2F98E.6010300@colorfullife.com>
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Andrew Morton wrote:
> > Which slabs are those?  SLAB_HWCACHE_ALIGN?  If so, that's quite a lot of
> > them (more than needed, probably).

On 2/3/06, Manfred Spraul <manfred@colorfullife.com> wrote:
> Slabs with 4 kB or larger objects.

Hmm. The relevant check is:

        if ((size < 4096
             || fls(size - 1) == fls(size - 1 + 3 * BYTES_PER_WORD)))

So for example, when object size is 4097, we _will_ get redzoning.
Shouldn't that be 5 * BYTES_PER_WORD btw?

                  Pekka
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