linux-kernel - Re: [PATCH 5/6] BC: kernel memory accounting (core)

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Message-ID: <20060824212340.GA952@oleg>
Date:	Fri, 25 Aug 2006 01:23:40 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
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>,
	Christoph Hellwig <hch@...radead.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	Rik van Riel <riel@...hat.com>, Andi Kleen <ak@...e.de>,
	Greg KH <greg@...ah.com>, Matt Helsley <matthltc@...ibm.com>,
	Rohit Seth <rohitseth@...gle.com>,
	Chandra Seetharaman <sekharan@...ibm.com>
Subject: Re: [PATCH 5/6] BC: kernel memory accounting (core)

On 08/23, Kirill Korotaev wrote:
>
> +int bc_slab_charge(kmem_cache_t *cachep, void *objp, gfp_t flags)
> +{
> +	unsigned int size;
> +	struct beancounter *bc, **slab_bcp;
> +
> +	bc = get_exec_bc();
> +	if (bc == NULL)
> +		return 0;

Is it possible to .exec_bc == NULL ?

If yes, why do we need init_bc? We can do 'set_exec_bc(NULL)' in __do_IRQ()
instead.

Oleg.

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