Messages in this thread | | | Date | Tue, 9 May 2006 13:23:34 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 7/14] random: Remove SA_SAMPLE_RANDOM from network drivers |
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On Po 08-05-06 12:27:26, Matt Mackall wrote: > On Mon, May 08, 2006 at 05:21:12PM +0000, Pavel Machek wrote: > > Hi! > > > > > > What do other platforms without a TSC do? > > > > > > Using get_cycles() for /dev/random is new as of 2.6. Before that, we > > > were directly calling rdtsc on x86 alone. 10msec resolution is fine > > > for plenty of sources. > > > > For what devices are timestamps still 'random/unobservable' in 10msec > > range? > > > > Maybe keyboard... but no, keyboard has autorepeat and can be observed > > remotely with 10msec accuracy in many cases. (telnet to bbs?) > > Please go look at the code.
Ok, so perhaps it got autorepeat right. Still you claimed "plenty" of usable sources, and keyboard is remotely observable. Please show me "plenty". Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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