Messages in this thread | | | Date | Sat, 9 Aug 2014 09:45:39 +0200 | From | Pavel Machek <> | Subject | Re: Reading large amounts from /dev/urandom broken |
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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 -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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