Date: Sun, 15 Jul 2007 23:15:49 +0200 From: Ed Schouten <ed@fxq.nl> To: Julian Elischer <julian@elischer.org> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: add closefrom() call Message-ID: <20070715211549.GB39075@hoeg.nl> In-Reply-To: <468E7007.5050607@elischer.org> References: <de5dfb5a0707041727j3e3518f9l5a019717a9f90aa@mail.gmail.com> <20070705122650.GE1302@britannica.bec.de> <468E16E6.6030608@delphij.net> <20070706112453.GA3217@hoeg.nl> <468E7007.5050607@elischer.org>
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* Julian Elischer <julian@elischer.org> wrote:
> Ed Schouten wrote:
>> Wouldn't it be better to just implement it through fcntl() and implement
>> closefrom() in libc?
>
> that's a possibility but I personally thing the huge difference in
> efficiency
> makes it worth putting it in the kernel.
> Quite a few programs I know of could really help their startup time with
> this as the first thing they do is "close the first 2000 file descriptors.
Woops! Sorry for responding this late, but it looks like I didn't
explain myself good enough. Sorry. :) To rephrase myself:
Wouldn't it be better to just implement fcntl(..., F_CLOSEM, ...) in the
kernel and make closefrom() a simple libc routine:
void
closefrom(int lowfd)
{
fcntl(lowfd, F_CLOSEM, NULL);
}
Similar to creat(2).
--
Ed Schouten <ed@fxq.nl>
WWW: http://g-rave.nl/
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