linux-kernel - Re: [PATCH 1/6] fastboot: Asynchronous function calls to speed up kernel boot

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Date:	Wed, 14 Jan 2009 09:04:33 +0000
From:	Arjan van de Ven <arjan@...radead.org>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH 1/6] fastboot: Asynchronous function calls to speed up
 kernel boot

On Wed, 14 Jan 2009 13:32:43 +0800
Zhang Rui <rui.zhang@...el.com> wrote:
> > +
> > +       wait_event(async_done, lowest_in_progress >= cookie);
> > +
> 
> In some cases, we only want to wait for a specific cookie
> rather than all the cookies smaller than it.
> 
> For example:
> device          cookie
> ACPI battery    1
> ata port 0      2
> ata port 1      3
> ata port 0 and port 1 in the same host can not be probed in parallel.
> 
> In this case, ata port1 should only wait for cookie 2 rather than
> both 1 and 2.
> 

I really don't want to go this way; ordering is really important and I
don't want to break this.

If you really have a fully separate domain (and there's only few of
those in our kernel), then use a special run list.



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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