From: Denis Vlasenko <vda@ilport.com.ua>
To: Wu Fengguang <wfg@mail.ustc.edu.cn>
Subject: Re: [RFC] kernel facilities for cache prefetching
Date: Sat, 6 May 2006 09:49:31 +0300
User-Agent: KMail/1.8.2
Cc: Arjan van de Ven <arjan@infradead.org>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
       Jens Axboe <axboe@suse.de>, Nick Piggin <nickpiggin@yahoo.com.au>,
       Badari Pulavarty <pbadari@us.ibm.com>
References: <20060502075049.GA5000@mail.ustc.edu.cn> <1146558617.32045.23.camel@laptopd505.fenrus.org> <346559990.12674@ustc.edu.cn>
In-Reply-To: <346559990.12674@ustc.edu.cn>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200605060949.31990.vda@ilport.com.ua>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1147
Lines: 27

On Tuesday 02 May 2006 11:53, Wu Fengguang wrote:
> On Tue, May 02, 2006 at 10:30:17AM +0200, Arjan van de Ven wrote:
> > one interesting thing that came out of the fedora readahead work is that
> > most of the bootup isn't actually IO bound. My test machine for example
> > can load all the data into ram in about 10 seconds, so that the rest of
> > the boot is basically IO-less. But that still takes 2 minutes....
> > So I'm not entirely sure how much you can win by just attacking this.
> 
> Yes, I find it hard to improve the boot time of the init.d stage.

Then _get rid of your init.d_.

SysV init sequence is insane.

I use daemontools-based setup and it starts up to login prompt
in 5-10 secs (counting from the root fs mount).

In my setup, after a few simple startup scripts a svscan process
is called, which starts all services in parallel.
Gettys are services, and start right away.
--
vda
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/