From: Pavel Machek <pavel@suse.cz>
To: "Woodruff, Richard" <r-woodruff2@ti.com>
Cc: "Reddy, Teerth" <teerth@ti.com>, pm list <linux-pm@lists.osdl.org>
Subject: Re: Use of parallel init threads for slow devices start ups?
Date: Mon, 19 Feb 2007 23:26:40 +0100 [thread overview]
Message-ID: <20070219222640.GC21214@elf.ucw.cz> (raw)
In-Reply-To: <3B6D69C3A9EBCA4BA5DA60D9130274295B9D66@dlee13.ent.ti.com>
Hi!
> While doing some startup time profiling it is noticed we spend a lot of
> time in the idle loop. As there is only one thread initializing devices
> there is no one to schedule during device start ups. So for example an
> external sensor might need a couple seconds to power up.
>
> Does anyone want to give an opinion on forking off a parallel thread to
> handle slower devices which are not dependent?
GregKH had a patch to do that for PCI and USB, but it was broken. You
are welcome to ressurect them and fix them...
> This is true for boot time and for device resume time...
Lets get it right for boot, first.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2007-02-19 22:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-19 17:50 Use of parallel init threads for slow devices start ups? Woodruff, Richard
2007-02-19 22:26 ` Pavel Machek [this message]
2007-02-19 23:52 ` Andi Kleen
2007-02-20 0:48 ` Greg KH
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