src-test2/sys/dev/random/harvest.c, branch release/7.0.0_cvs FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F7.0.0_cvs 2008-02-24T05:45:17Z This commit was manufactured by cvs2svn to create tag 2008-02-24T05:45:17Z cvs2svn cvs2svn@FreeBSD.org 2008-02-24T05:45:17Z urn:sha1:a9c219fa3cec18ef9f30edec6fa106bf0e2d423d 'RELENG_7_0_0_RELEASE'. This commit was manufactured to restore the state of the 7.0-RELEASE image. Annotate that get_cyclecount() can be expensive on some platforms, 2004-10-18T19:29:13Z Robert Watson rwatson@FreeBSD.org 2004-10-18T19:29:13Z urn:sha1:8f30dde5fee772ca49e9719d692c1d75a9e1046a which juxtaposes nicely with the comment just above on how the harvest function must be cheap. Default to harvesting everything. This is to help give a faster 2004-04-16T17:07:11Z Mark Murray markm@FreeBSD.org 2004-04-16T17:07:11Z urn:sha1:2a8b87d883fc0b98a4db6d6fbd8061d00b32e07f startup. harvesting can be turned OFF in etc/rc.d/* if it is a burden. Reorganise the entropy device so that high-yield entropy sources 2004-04-09T15:47:10Z Mark Murray markm@FreeBSD.org 2004-04-09T15:47:10Z urn:sha1:e7806b4c0eb398aba8b6e8ddeda96e6ddd9305ae can more easily be used INSTEAD OF the hard-working Yarrow. The only hardware source used at this point is the one inside the VIA C3 Nehemiah (Stepping 3 and above) CPU. More sources will be added in due course. Contributions welcome! kthread_exit() no longer requires Giant, so don't force callers to acquire 2004-03-05T22:42:17Z John Baldwin jhb@FreeBSD.org 2004-03-05T22:42:17Z urn:sha1:6074439965095d5265de872bb966a1a743edb724 Giant just to call kthread_exit(). Requested by: many Overhaul the entropy device: 2003-11-17T23:02:21Z Mark Murray markm@FreeBSD.org 2003-11-17T23:02:21Z urn:sha1:0887c8c110da2f060bc422e6942320054bcc755d o Each source gets its own queue, which is a FIFO, not a ring buffer. The FIFOs are implemented with the sys/queue.h macros. The separation is so that a low entropy/high rate source can't swamp the harvester with low-grade entropy and destroy the reseeds. o Each FIFO is limited to 256 (set as a macro, so adjustable) events queueable. Full FIFOs are ignored by the harvester. This is to prevent memory wastage, and helps to keep the kernel thread CPU usage within reasonable limits. o There is no need to break up the event harvesting into ${burst} sized chunks, so retire that feature. o Break the device away from its roots with the memory device, and allow it to get its major number automagically. Use __FBSDID(). 2003-08-24T17:55:58Z David E. O'Brien obrien@FreeBSD.org 2003-08-24T17:55:58Z urn:sha1:aad970f1fee9a2a3e5a0f880be9b87c6193b3bd1 Also some minor style cleanups. Remove srandom(): 2003-02-05T15:56:04Z Andrey A. Chernov ache@FreeBSD.org 2003-02-05T15:56:04Z urn:sha1:952b6153de6b9223e318948d8c1ae090672a135c 1) It is already called in init_main.c:proc0_post() 2) It is called each time read_random_phony() called, because "initialized" variable is never set to 1. Approved by: markm Fix really dumb braino of mine; cast a sizeof() to an int, which it is 2002-04-21T11:02:36Z Mark Murray markm@FreeBSD.org 2002-04-21T11:02:36Z urn:sha1:815eb79cb8aeda7b35099acfb2e30a6d4989d2f8 being compared to, not size_t, which it already is. Massive lint-inspired cleanup. 2002-03-03T19:44:22Z Mark Murray markm@FreeBSD.org 2002-03-03T19:44:22Z urn:sha1:e119960112f35b3ec1179e262cccde05b59a0309 Remove unneeded includes. Deal with unused function arguments. Resolve a boatload of signed/unsigned imcompatabilities. Etc.