Subject: Re: FreeBSD's /dev on NetBSD
To: None <>
From: Hans Petter Selasky <>
List: tech-kern
Date: 08/15/2005 16:13:03
On Sunday 14 August 2005 03:00, Jason Thorpe wrote:
> On Aug 13, 2005, at 3:09 PM, Hans Petter Selasky wrote:
> > I've heard that NetBSD is very against mutexes. Is this true? Will
> > NetBSD
> > always use one lock for the whole kernel?
> Where did you hear that?

I think it was an article at "" or some mailing list.

I cannot find the article right now, but there was a comparison between 
FreeBSD 5/6 and NetBSD, where NetBSD was found to be faster, and then there 
was some disscussion whether this had to do with mutexes. And then someone 
wrote that NetBSD did not use mutexes like on FreeBSD and that this made the 
system faster. But someone else said that it was extra checking in the kernel 
that made FreeBSD perform so bad in this comparison ...