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Default branch: MAIN
Current tag: MAIN
Revision 1.2 / (download) - annotate - [select for diffs], Tue Apr 17 02:50:38 2012 UTC (13 months ago) by tls
CVS Tags: yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, tls-maxphys-nbase, tls-maxphys-base, tls-maxphys, khorben-n900, jmcneill-usbmp-base9, jmcneill-usbmp-base10, agc-symver-base, agc-symver, HEAD
Changes since 1.1: +8 -4 lines
Diff to previous 1.1 (colored)
Address multiple problems with rnd(4)/cprng(9): 1) Add a per-cpu CPRNG to handle short reads from /dev/urandom so that programs like perl don't drain the entropy pool dry by repeatedly opening, reading 4 bytes, closing. 2) Really fix the locking around reseeds and destroys. 3) Fix the opportunistic-reseed strategy so it actually works, reseeding existing RNGs once each (as they are used, so idle RNGs don't get reseeded) until the pool is half empty or newly full again.
Revision 1.1 / (download) - annotate - [select for diffs], Thu Feb 2 19:43:07 2012 UTC (15 months, 2 weeks ago) by tls
CVS Tags: yamt-pagecache-base4, netbsd-6-base, jmcneill-usbmp-base8, jmcneill-usbmp-base7, jmcneill-usbmp-base6, jmcneill-usbmp-base5, jmcneill-usbmp-base4, jmcneill-usbmp-base3, jmcneill-usbmp-base2
Branch point for: yamt-pagecache, netbsd-6, jmcneill-usbmp
Entropy-pool implementation move and cleanup. 1) Move core entropy-pool code and source/sink/sample management code to sys/kern from sys/dev. 2) Remove use of NRND as test for presence of entropy-pool code throughout source tree. 3) Remove use of RND_ENABLED in device drivers as microoptimization to avoid expensive operations on disabled entropy sources; make the rnd_add calls do this directly so all callers benefit. 4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might have lead to slight entropy overestimation for some sources. 5) Add new source types for environmental sensors, power sensors, VM system events, and skew between clocks, with a sample implementation for each. ok releng to go in before the branch due to the difficulty of later pullup (widespread #ifdef removal and moved files). Tested with release builds on amd64 and evbarm and live testing on amd64.
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