On Wed 2009-07-15 15:38:36, Zhang Rui wrote:
> Introduce the device async action mechanism.
>
> In order to speed up Linux suspend/resume/shutdown process,
> we introduce the device async action mechanism that allow devices
> to suspend/resume/shutdown asynchronously.
>
> The basic idea is that,
> if the suspend/resume/shutdown process of a device set,
> including a root device and its child devices, are independent of
> other devices, we create an async domain for this device set,
> and make them suspend/resume/shutdown asynchronously.
>
> Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> ---
> drivers/base/Makefile | 3
> drivers/base/async_dev.c | 180 ++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/async_dev.h | 40 ++++++++++
> include/linux/device.h | 2
> 4 files changed, 224 insertions(+), 1 deletion(-)
>
> Index: linux-2.6/include/linux/async_dev.h
> ===================================================================
> --- /dev/null
> +++ linux-2.6/include/linux/async_dev.h
> @@ -0,0 +1,40 @@
> +/*
> + * async_dev.h: function calls for device async actions
> + *
> + * (C) Copyright 2009 Intel Corporation
> + * Author: Zhang Rui <rui.zhang@xxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; version 2
> + * of the License.
> + */
> +
> +#ifndef _ASYNC_DEV_H_
> +#define _ASYNC_DEV_H_
> +
> +#include <linux/types.h>
> +#include <linux/list.h>
> +#include <linux/async.h>
> +#include <linux/device.h>
> +#include <linux/pm.h>
> +
> +struct dev_async_struct {
> + struct device *dev;
> + int type;
> + /* Synchronization Domain for device async actions */
> + struct list_head domain;
> + struct list_head node;
> + async_cookie_t cookie;
> +};
> +
> +#define DEV_ASYNC_ACTIONS_ALL 0
> +
> +extern int dev_async_schedule(struct device *, void *,
> + void *, int);
> +extern void dev_async_synchronization(void);
'_synchronize' to be consistent with schedule?
--
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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