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Date: Tue, 14 Jun 2005 19:33:01 +0800
From: Sue Howard <howardsue@gmail.com>
To: arch@freebsd.org, ken@freebsd.org
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Subject: [DCR] Remove devstat
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Hi,

I found devstat is not widely used in the device drivers. Based the
grep result of 'devstat_new_entry', it shows only cam, ata, fd,
geom_disk are using it. In my workstation, the output of 'sysctl
kern.devstat' shows:

kern.devstat.version: 6
kern.devstat.generation: 229
kern.devstat.numdevs: 2

I am wondering if devstat can be replaced by the sysctl nodes %desc,
%pnpinfo etc that jhb introduced. Almost all the information devstat
can provide can be also exposed by such sysctl node.

I have plan to introduce a new node named status so that userland can
disable on individual device. Before that, I want to understand some
related stuffs.

Any comments about this?

Howard Sue