linux-kernel - Re: [patch 7/8] fdmap v2

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Message-ID: <alpine.LFD.0.98.0706101118500.20321@woody.linux-foundation.org>
Date:	Sun, 10 Jun 2007 11:19:44 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Eric Dumazet <dada1@...mosbay.com>
cc:	Al Viro <viro@....linux.org.uk>,
	Kyle Moffett <mrmacman_g4@....com>,
	Ulrich Drepper <drepper@...hat.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Theodore Tso <tytso@....edu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2



On Sun, 10 Jun 2007, Eric Dumazet wrote:

> Linus Torvalds a écrit :
> > 
> > 	close(0);
> > 	close(1);
> > 	close(2);
> > 	.. generate filenames, whatever ..
> > 	if (open(..) < 0 || open(..) < 0 || open(..) < 0)
> > 		die("Couldn't redirect stdin/stdout/stderr");
> > 
> > and there's absolutely nothing wrong with this kind of setup, even if you
> > could obviously have done it other ways too (ie by using "dup2()" instead of
> > "close + open"),
> 
> This kind of setup was OK 25 years ago, before multithreading era.
> You cannot reasonably expect it to work in a multithreaded program.

Who said _anything_ about threading?

The above is a totally non-threaded app. 99% of all applications are like 
that.

Threading is for the 1%. But 99% is what we need to make sure works.

		Linus