Date: Sat, 9 Jun 2007 21:03:23 -0700 (PDT)
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Al Viro <viro@ftp.linux.org.uk>
cc: Kyle Moffett <mrmacman_g4@mac.com>, Ulrich Drepper <drepper@redhat.com>,
       Davide Libenzi <davidel@xmailserver.org>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>, Theodore Tso <tytso@mit.edu>,
       Eric Dumazet <dada1@cosmosbay.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2
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On Sun, 10 Jun 2007, Al Viro wrote:

> On Sat, Jun 09, 2007 at 08:48:39PM -0700, Linus Torvalds wrote:
> > Agreed. That was actually part of the reason why I thought clone() was
> > much better than the pthreads interface.
> > 
> > That said, the Linux !CLONE_FILES does have downsides:
> > 
> >  - it is potentially much slower to do than sharing everything (if you 
> >    have lots of file descriptors, incrementing the refcounts etc is 
> >    actually a real overhead)
> 
> Huh?  We _skip_ the overhead when descriptor table is not shared.

Not for clone()/exit(), ie the actual _creation_ of the thread.

		Linus
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