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Date: Mon, 10 Mar 2003 11:56:32 +0200
From: Sheldon Hearn <sheldonh@starjuice.net>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
Cc: Nate Lawson <nate@root.org>, cvs-src@FreeBSD.org,
	src-committers@FreeBSD.org
Subject: Re: cvs commit: src/sys/sys devicestat.h
Message-ID: <20030310095632.GB12316@starjuice.net>
References: <Pine.BSF.4.21.0303082347200.90870-100000@root.org> <78207.1047196679@critter.freebsd.dk>
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On (2003/03/09 08:57), Poul-Henning Kamp wrote:

> >How about a mtx covering the structure and a read from the device returns
> >the structure under lock?
> 
> The goal is to avoid locking in the kernel and put the overhead in
> userland.  Remember, most of the time nobody cares about the statistics
> so they should be cheap.

Amen!

Ciao,
Sheldon.

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