linux-kernel - Re: [ckrm-tech] [PATCH 4/13] BC: context handling

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Date:	Wed, 22 Nov 2006 23:48:56 -0800
From:	"Paul Menage" <menage@...gle.com>
To:	"Kirill Korotaev" <dev@...ru>
Cc:	"Andrew Morton" <akpm@...l.org>, ckrm-tech@...ts.sourceforge.net,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	matthltc@...ibm.com, hch@...radead.org,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>, oleg@...sign.ru,
	devel@...nvz.org, xemul@...nvz.org
Subject: Re: [ckrm-tech] [PATCH 4/13] BC: context handling

On 11/9/06, Kirill Korotaev <dev@...ru> wrote:
> +
> +int bc_task_move(int pid, struct beancounter *bc, int whole)
> +{

...

> +
> +       down_write(&mm->mmap_sem);
> +       err = stop_machine_run(do_set_bcid, &data, NR_CPUS);
> +       up_write(&mm->mmap_sem);

Isn't this a little heavyweight for moving a task into/between beancounters?

Paul
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