From: David Miller <davem@davemloft.net>
To: clameter@sgi.com
Cc: mpm@selenic.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: + fix-spellings-of-slab-allocator-section-in-init-kconfig.patch added to -mm tree
Date: Tue, 08 May 2007 18:55:39 -0700 (PDT) [thread overview]
Message-ID: <20070508.185539.95059076.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0705081852310.17784@schroedinger.engr.sgi.com>
From: Christoph Lameter <clameter@sgi.com>
Date: Tue, 8 May 2007 18:53:28 -0700 (PDT)
> On Tue, 8 May 2007, David Miller wrote:
>
> > SLOB seems to look at the descriptor in the previous blob to figure
> > out how big the being-freed blob is. That's actually kind of clever
> > :-)
>
> We were assuming that the objects are actually allocated. How does it
> figure out the previous blobs boundaries without metadata?
The page is filled entirely with descriptors in the not-in-use regions
of the page aparently. So "freed_object - 1" will always give you
a descriptor.
I'm just reading over the code to figure out what to type to you, you
could read the code too it's not very complicated :-)
next prev parent reply other threads:[~2007-05-09 1:55 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200705082302.l48N2KrZ004229@shell0.pdx.osdl.net>
2007-05-09 0:23 ` Matt Mackall
2007-05-09 0:32 ` Alan Cox
2007-05-09 0:33 ` Matt Mackall
2007-05-09 0:43 ` Christoph Lameter
2007-05-09 0:51 ` Christoph Lameter
2007-05-09 1:27 ` Matt Mackall
2007-05-09 1:32 ` Christoph Lameter
2007-05-09 1:51 ` David Miller
2007-05-09 1:53 ` Christoph Lameter
2007-05-09 1:55 ` David Miller [this message]
2007-05-09 1:57 ` Christoph Lameter
2007-05-09 2:06 ` David Miller
2007-05-09 2:10 ` Nick Piggin
2007-05-09 2:20 ` Christoph Lameter
2007-05-09 2:02 ` Nick Piggin
2007-05-09 2:56 ` Matt Mackall
2007-05-09 3:18 ` Nick Piggin
2007-05-09 3:27 ` Christoph Lameter
2007-05-09 3:47 ` Nick Piggin
2007-05-10 0:42 ` Andrew Morton
2007-05-10 1:00 ` Nick Piggin
2007-05-10 2:27 ` Matt Mackall
2007-05-09 2:19 ` Matt Mackall
2007-05-09 2:24 ` Christoph Lameter
2007-05-09 2:43 ` Nick Piggin
2007-05-09 2:57 ` Christoph Lameter
2007-05-09 3:04 ` Nick Piggin
2007-05-09 3:08 ` Christoph Lameter
2007-05-09 3:25 ` Matt Mackall
2007-05-09 3:16 ` Matt Mackall
2007-05-09 3:24 ` Christoph Lameter
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