Re: Reading large amounts from /dev/urandom broken

[Pavel Machek]

Hi!

> I've inquired on the bugzilla why the reporter is abusing urandom in
> this way.  The other commenter on the bug replicated the problem, but
> that's not a "second bug report" in my book.
> 
> At the very least, this will probably cause me to insert a warning
> printk: "insane user of /dev/urandom: [current->comm] requested %d
> bytes" whenever someone tries to request more than 4k.

Warn about my quick benchmark?

http://atrey.karlin.mff.cuni.cz/~pavel/quickbench.html

I don't see what is insane about it. Yes, there might be more
effective generators of random bits, but that is not the point, this
is quick&dirty attempt at benchmark.

Also people will use cat /dev/urandom > /dev/sdX (and similar) to
clean hard drives. There should be no need to warn about
that. (Performance is going to be disk-limited anyway).

									Pavel
-- 
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