Am Freitag, 17. Juni 2016, 11:26:23 schrieb Sandy Harris: Hi Sandy, > David Jaša <djasa@xxxxxxxxxx> wrote: > > BTW when looking at an old BSI's issue with Linux urandom that Jarod > > Wilson tried to solve with this series: > > https://www.spinics.net/lists/linux-crypto/msg06113.html > > I was thinking: > > 1) wouldn't it help for large urandom consumers if kernel created a DRBG > > instance for each of them? It would likely enhance performance and solve > > BSI's concern of predicting what numbers could other urandom consumers > > obtain at cost of memory footprint > > and then, after reading paper associated with this series: > > 2) did you evaluate use of intermediate DRBG fed by primary generator to > > instantiate per-node DRBG's? It would allow initialization of all > > secondary DRBGs right after primary generator initialization. > > Theodore Ts'o, the random maintainer, already has a patch that > seems to deal with this issue. He has posted more than one > version & I'm not sure this is the best or latest, but ... > https://lkml.org/lkml/2016/5/30/22 His latest patch set that he mentioned to appear in 4.8 covers a per-NUMA DRNG where there is a "primary" /dev/urandom DRNG where secondary DRNGs for the NUMA nodes are spawned from. Ciao Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
