From: Theodore Tso <tytso@mit.edu>
To: Pavel Machek <pavel@ucw.cz>
Cc: M Macnair <mmacnair@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Seeding /dev/random not working
Date: Tue, 29 May 2007 12:30:56 -0400 [thread overview]
Message-ID: <20070529163056.GE9899@thunk.org> (raw)
In-Reply-To: <20070529141456.GC5840@ucw.cz>
On Tue, May 29, 2007 at 02:14:56PM +0000, Pavel Machek wrote:
> Can we get at least time-of-boot from rtc clock to the pool? We really
> should not be getting identical outputs...
We are mixing the time-of-dat at boot time into the pool already,
using ktime_get_real() in random.c:init_std_data(). The problem
though is if the board doesn't have a valid RTC clock, or its battery
is dead, and the time-of-day clock is getting set by userspace, then
unless userspace also mixes in the time once it's been set via ntpdate
or whatever, it won't help the entropy pool.
- Ted
next prev parent reply other threads:[~2007-05-29 16:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 11:53 Seeding /dev/random not working M Macnair
2007-05-29 13:15 ` Theodore Tso
2007-05-29 13:38 ` M Macnair
2007-05-29 14:14 ` Pavel Machek
2007-05-29 15:17 ` M Macnair
2007-05-29 15:31 ` Jesper Juhl
2007-05-29 16:30 ` Theodore Tso [this message]
2007-05-29 20:06 ` Folkert van Heusden
2007-05-29 17:46 ` Matt Mackall
2007-05-29 18:00 ` Matt Mackall
2007-05-29 19:23 ` Eric Dumazet
2007-05-29 19:35 ` Matt Mackall
2007-05-29 16:58 ` Andi Kleen
2007-05-29 16:44 ` M Macnair
2007-05-29 20:23 ` Matt Mackall
2007-05-29 22:08 ` Andi Kleen
2007-05-29 21:44 ` Matt Mackall
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