On 2020-02-10 10:44, Rui Salvaterra wrote: > On Fri, 31 Jan 2020 at 08:12, Felix Fietkau <n...@nbd.name> wrote: >> >> For at least AR5008 and AR9002, but probably also for AR9003 I would >> like to keep the behavior of collecting entropy only once at driver >> initialization. >> Last time I worked on this I noticed that on several chips, sampling >> entropy during normal operation caused stability issues that were hard >> to pin down but quite noticeable. >> I think the benefit of continuous entropy collection is simply not worth >> the extra cost of potential stability issues and debugging time. >> >> - Felix > > Hi again, Felix, > > FWIW, this patch has just survived a whole weekend of rngtest < > /dev/random on a Buffalo WZR-HP-AG300H (dual AR9002). Output follows: > > root@AP157427:~# rngtest < /dev/random > rngtest 6.6 > Copyright (c) 2004 by Henrique de Moraes Holschuh > This is free software; see the source for copying conditions. There > is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A > PARTICULAR PURPOSE. > > rngtest: starting FIPS tests... > ^Crngtest: bits received from input: 224241980032 > rngtest: FIPS 140-2 successes: 11203058 > rngtest: FIPS 140-2 failures: 9041 > rngtest: FIPS 140-2(2001-10-10) Monobit: 1165 > rngtest: FIPS 140-2(2001-10-10) Poker: 1175 > rngtest: FIPS 140-2(2001-10-10) Runs: 3340 > rngtest: FIPS 140-2(2001-10-10) Long run: 3405 > rngtest: FIPS 140-2(2001-10-10) Continuous run: 0 > rngtest: input channel speed: (min=165.459; avg=1025.932; > max=1093.147)Kibits/s > rngtest: FIPS tests speed: (min=503.707; avg=14584.165; max=14920.741)Kibits/s > rngtest: Program run time: 228508694816 microseconds The issues that were reported years ago were mainly stuck beacons, increase in hardware resets, connection stability issues.
- Felix _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel