linux-kernel - Re: Power management for SCSI

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Message-ID: <Pine.LNX.4.44L0.0808191027070.2669-100000@iolanthe.rowland.org>
Date:	Tue, 19 Aug 2008 10:32:19 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Pavel Machek <pavel@...e.cz>
cc:	kernel list <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	<James.Bottomley@...senPartnership.com>, <teheo@...ell.com>,
	<oneukum@...e.de>
Subject: Re: Power management for SCSI

On Tue, 19 Aug 2008, Pavel Machek wrote:

> Would it make sense to split the patches into "autosuspend for SCSI
> devices" and "autosuspend for SCSI controllers" for easier
> review/merge? I guess I'll start with the devices, they seem easier...

It really should be split up differently.  The topics of interest are:

	idle detection for SCSI devices,

	autosuspend for SCSI targets and its relation to suspend
	for SCSI devices,

	passing suspend & resume notifications to the transport class,

	adding a USB transport class so that usb-storage can respond
	to those notifications,

	modifying other transport classes as needed so that the LLDs
	can power-down links or host adapters.

I think that covers it.  Oliver may have some additional suggestions.

Alan Stern

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