Date: Mon, 17 Nov 2003 15:02:21 -0800 (PST) From: Mark Murray <markm@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/random harvest.c hash.c randomdev.c randomdev.h yarrow.c Message-ID: <200311172302.hAHN2LSu061069@repoman.freebsd.org>
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markm 2003/11/17 15:02:21 PST
FreeBSD src repository
Modified files:
sys/dev/random harvest.c hash.c randomdev.c randomdev.h
yarrow.c
Log:
Overhaul the entropy device:
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.
Revision Changes Path
1.21 +5 -5 src/sys/dev/random/harvest.c
1.11 +1 -1 src/sys/dev/random/hash.c
1.45 +92 -101 src/sys/dev/random/randomdev.c
1.4 +4 -1 src/sys/dev/random/randomdev.h
1.43 +3 -19 src/sys/dev/random/yarrow.c
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