linux-kernel - Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev

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Message-Id: <200908101505.36414.a1426z@gawab.com>
Date:	Mon, 10 Aug 2009 15:05:36 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	Scott James Remnant <scott@...ntu.com>
Cc:	Greg KH <greg@...ah.com>, Andi Kleen <andi@...stfloor.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>,
	Jan Blunck <jblunck@...e.de>, gregkh@...e.de,
	Harald Hoyer <harald@...hat.com>
Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev

Scott James Remnant wrote:
> On Thu, 2009-08-06 at 23:18 +0300, Al Boldi wrote:
> > Maybe they are using the same trick as Ubuntu and Debian, as they run
> > udev in the background to hide the slowness.  Both Fedora and Mandriva
> > run udev in the foreground where the slowness is visible.
>
> Ubuntu does not run udev in the background.

I put a date timestamp at the beginning and end of the start command of 
init.d/udev, and when you stop and then start init.d/udev it shows a ~5s 
delay.  At boot I don't see this delay, but instead see the initial date 
stamp, then a flurry of parallel activity, then the final date stamp, which 
shows the ~5s delay.


Thanks!

--
Al
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