Date: Fri, 08 Apr 2005 10:28:36 -0700 From: Sam Leffler <sam@errno.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: src-committers@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_mutex.c Message-ID: <4256BF44.2000100@errno.com> In-Reply-To: <19677.1112980993@critter.freebsd.dk> References: <19677.1112980993@critter.freebsd.dk>
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Poul-Henning Kamp wrote: > In message <4256B3EF.5090702@errno.com>, Sam Leffler writes: > > >>I agree with bde. One major distinction I've noticed between Linux and >>BSD systems is that Linux uses sysctls (aka /proc) in lieu of user-mode >>tools that retrieve and format data. While this is a reasonable >>approach when you're distributing only a kernel that's not the case >>here. For debug info I can buy doing it (e.g. single user and no apps > >>from src/tools), but otherwise we're just adding stuff to the kernel > >>that belongs in apps. > > > The reason I disagree is that the amount of code it takes to convert > the data to an export format and the overhead of having a program in > userspace format it into text is ridiculous compared to just formatting > things in the kernel to begin with. My experience is the opposite. > > And besides, a formatted sysctl has no binary compatibility issues at > all. I like that too. > Sure, that's the downside; you need to design binary protocols with care (this is a protocol after all). Sam
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