linux-kernel - Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

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Message-ID: <Pine.LNX.4.64.0805291620250.5415@sbz-30.cs.helsinki.fi>
Date:	Thu, 29 May 2008 16:21:05 +0300 (EEST)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	David Howells <dhowells@...hat.com>
cc:	Christoph Lameter <clameter@....com>,
	Paul Mundt <lethal@...ux-sh.org>,
	LKML <linux-kernel@...r.kernel.org>, cooloney@...nel.org,
	akpm@...ux-foundation.org, mpm@...enic.com
Subject: Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

On Thu, 29 May 2008, David Howells wrote:
> ELF-FDPIC is currently using kobjsize() so that it can expand the heap/stack
> segment to fill up the entirety of its allocation.  It's probably worth
> dropping that, though.
> 
> NOMMU mmap() is using kobjsize()/ksize() to keep track of the number of bytes
> allocated and the amount of dead space.  We can probably ditch that too.
> 
> However, fs/proc/task_nommu.c uses kobjsize() quite a bit to determine how
> much metadata space a process is carrying around.  We could just use sizeof(),
> I suppose, and not bother calculating the slack.

For short term, we should merge my two nommu patches as-is, no?
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