Date: Sat, 25 Sep 2004 05:21:49 -0700 From: Bruce M Simpson <bms@spc.org> To: Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= <des@des.no> Cc: freebsd-hackers@freebsd.org Subject: Re: execute a user process in the kernel Message-ID: <20040925122149.GD814@empiric.icir.org> In-Reply-To: <xzpisa2twd0.fsf@dwp.des.no> References: <BAY1-F10eZZfm95LyRk00055aa3@hotmail.com> <16722.59709.451226.932084@guru.mired.org> <xzpekkrwsca.fsf@dwp.des.no> <20040925100740.GA814@empiric.icir.org> <xzpisa2twd0.fsf@dwp.des.no>
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On Sat, Sep 25, 2004 at 01:35:07PM +0200, Dag-Erling Smørgrav wrote: > > If we were to implement POSIX spawn(), we'd need something like this. > > Uh, no. posix_spawn(3) can be implemented entirely in userland and > does not require any special kernel support. Discussions with peter@ and others on IRC have been ongoing regarding doing it in kernel space, so as to avoid unnecessarily expensive VM fork operations when 'spawning' a process. I'd be interested to hear more about your proposal for doing this in userland. BMS
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