Date: Sat, 30 Nov 2002 22:27:27 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Robert Watson <rwatson@freebsd.org> Cc: Yury Tarasievich <grog@grsu.by>, freebsd-hackers@freebsd.org Subject: Re: documentation on kernel locks, mutexes? Message-ID: <3DE9ABCF.80AAAC2F@mindspring.com> References: <Pine.NEB.3.96L.1021130184341.29371C-100000@fledge.watson.org>
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Robert Watson wrote: > On Mon, 25 Nov 2002, Terry Lambert wrote: > > Yury Tarasievich wrote: > > > I need to port some driver from linux to freebsd and, somehow, > > > I can't find documentation on kernel locks and mutexes. > > > There are no man pages, links from handbook are broken, and search on > > > freebsd site gives nothing (besides the handbook itself). > > > > > > Where can I find some docs? > > > > Kernel documentation is poor, because interfaces are not as fixed in > > stone as you might expect them to be to encourage third party > > developement and porting efforts like yours. > > Funny, the SMPng primitives seem in general to be fairly well documented. > See my previous e-mail to Yury with a list of man page references. It's > certainly true that the source is a good reference to look at existing > locking strategies, but there certainly do appear to be man pages for the > locking primitives. I was thinking more in terms of device driver information. All of the "how to write a driver for newbus", "how to write a CAM driver", "how to use devfs from the kernel", "what XXX to do in FreeBSD, given YYY in Linux", "how to port a driver from Linux to FreeBSD", etc., are missing. While it's true that kernel locks and mutexes are documented for SMPng, he posted to -hackers, not -current, and so he's probably not interested in -current primitives that aren't available in the 4.x -RELEASE and -STABLE branches. His points about the handbook are salient, too. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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