Re: Seeding /dev/random not working

[Theodore Tso]

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

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