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From: Mark Murray <markm@FreeBSD.org>
Date: Sat, 15 Sep 2012 12:30:44 +0100
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Cc: Arthur Mesh <arthurmesh@gmail.com>,
	Ian Lepore <freebsd@damnhippie.dyndns.org>,
	Doug Barton <dougb@freebsd.org>, freebsd-security@freebsd.org,
	RW <rwmaillists@googlemail.com>, "Bjoern A. Zeeb" <bz@freebsd.org>
Subject: Re: svn commit: r239569 - head/etc/rc.d
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Ben Laurie writes:
> > Reseeds are expensive in kernel space; locking/unlocking and thread
> > consumption are the issue. Right now, this is mitigated by reseeding
> > at 10Hz. To allow reseeds to overwhelm the running kernel by pumping
> > data into /dev/random is would be very silly indeed, and I'm not
> > going to let that happen.
>
> I'm curious what the comparative cost of
>
> cat /dev/zero > /dev/null
>
> is?
>
> Or,
>
> cat /dev/zero > somefile

10+ years ago, on a different continent, I had this data. 1 burglary
and one intercontinental relocation later, and I don't have it any
more. Recreating is something I'll likely get to, but DHYB.

M
--
Mark R V Murray
Pi: 132511160