From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org
Subject: Re: [SLUB 3/5] Validation of slabs (metadata and guard zones)
Date: Tue, 10 Apr 2007 16:43:07 -0700 [thread overview]
Message-ID: <20070410164307.83578b6e.akpm@linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0704101547290.32218@schroedinger.engr.sgi.com>
On Tue, 10 Apr 2007 15:49:59 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:
> +
> + /*
> + * Verify that the number of objects is within permitted limits.
> + * The page->inuse field is only 16 bit wide! So we cannot have
> + * more than 64k objects per slab.
> + */
> if (!s->objects || s->objects > 65535)
So we _could_ use (sizeof(page->inuse) << 8). A bit anal, I guess, but
it would provide documentation and future-proofness. Dunno.
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next prev parent reply other threads:[~2007-04-10 23:43 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 19:19 [SLUB 1/5] Fix object counting Christoph Lameter
2007-04-10 19:19 ` [SLUB 2/5] Enable tracking of full slabs Christoph Lameter
2007-04-10 19:19 ` [SLUB 3/5] Validation of slabs (metadata and guard zones) Christoph Lameter
2007-04-10 20:31 ` Andrew Morton
2007-04-10 20:47 ` Dave Jones
2007-04-10 21:42 ` Andrew Morton
2007-04-10 21:10 ` Christoph Lameter
2007-04-10 21:13 ` Christoph Lameter
2007-04-10 21:14 ` Christoph Lameter
2007-04-10 21:15 ` Christoph Lameter
2007-04-10 21:21 ` Christoph Lameter
2007-04-10 21:40 ` Christoph Lameter
2007-04-10 22:49 ` Christoph Lameter
2007-04-10 23:43 ` Andrew Morton [this message]
2007-04-10 23:17 ` Christoph Lameter
2007-04-10 23:38 ` Christoph Lameter
2007-04-11 0:00 ` Christoph Lameter
2007-04-11 0:15 ` Christoph Lameter
2007-04-11 6:24 ` question on mmap sameer sameer
2007-04-13 17:59 ` Hugh Dickins
2007-04-11 2:24 ` [SLUB 3/5] Validation of slabs (metadata and guard zones) Christoph Lameter
2007-04-11 3:08 ` Andrew Morton
2007-04-10 19:19 ` [SLUB 4/5] Add ability to list alloc / free callers per slab Christoph Lameter
2007-04-10 19:19 ` [SLUB 5/5] Drop version number Christoph Lameter
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