Date: Sun, 25 Jun 2000 01:32:39 -0700 (PDT) From: Mark Murray <markm@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/nulldev nulldev.c Message-ID: <200006250832.BAA37933@freefall.freebsd.org>
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markm 2000/06/25 01:32:39 PDT
Added files:
sys/dev/nulldev nulldev.c
Log:
New machine independant /dev/null and /dev/zero driver. This device is
severely stripped down compared with its predecessor, and is measurably
a _lot_ faster.
Many thanks to Jeroen van Gelderen for lots of good ideas.
There is still a problem with this; it is written as a mudule, and as
such is theoretically unloadable. However, there is no refcounting done
as I would prefer to do that a'la device_busy(9), rather than some
"home-rolled" scheme. The point is pretty moot, as /dev/null is
effectively compulsory.
Reviewed by: dfr
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