linux-kernel - Re: [PATCH 6/13] BC: kmemsize accounting (core)

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Message-ID: <84144f020611101446o3a1c05d0i592ea0ca853b73c@mail.gmail.com>
Date:	Sat, 11 Nov 2006 00:46:36 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Kirill Korotaev" <dev@...ru>
Cc:	"Andrew Morton" <akpm@...l.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>, xemul@...nvz.org,
	devel@...nvz.org, oleg@...sign.ru, hch@...radead.org,
	matthltc@...ibm.com, ckrm-tech@...ts.sourceforge.net
Subject: Re: [PATCH 6/13] BC: kmemsize accounting (core)

Hi,

On 11/9/06, Kirill Korotaev <dev@...ru> wrote:
> +#ifdef CONFIG_BEANCOUNTERS
> +#define BC_EXTRASIZE   sizeof(struct beancounter *)
> +static inline size_t slab_mgmt_size_noalign(int flags, size_t nr_objs)
> +{
> +       size_t size;
> +
> +       size = slab_mgmt_size_raw(nr_objs);
> +       if (flags & SLAB_BC)
> +               size = ALIGN(size, BC_EXTRASIZE) + nr_objs * BC_EXTRASIZE;
> +       return size;

Why do we want to track each allocated _object_ in the slab? Isn't
tracking pages enough?
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