From owner-freebsd-questions@FreeBSD.ORG Wed May 29 11:20:32 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 8171FC41 for ; Wed, 29 May 2013 11:20:32 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by mx1.freebsd.org (Postfix) with ESMTP id 450F596 for ; Wed, 29 May 2013 11:20:32 +0000 (UTC) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1UheQ0-0006H2-MN for freebsd-questions@freebsd.org; Wed, 29 May 2013 13:20:30 +0200 Received: from 79-139-19-75.prenet.pl ([79-139-19-75.prenet.pl]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 29 May 2013 13:19:48 +0200 Received: from jb.1234abcd by 79-139-19-75.prenet.pl with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 29 May 2013 13:19:48 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: jb Subject: Re: "swap" partition leads to instability? Date: Wed, 29 May 2013 11:19:32 +0000 (UTC) Lines: 22 Message-ID: References: <1369558712.96152.YahooMailNeo@web165006.mail.bf1.yahoo.com> <1369644392.92027.YahooMailNeo@web165003.mail.bf1.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: sea.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 79.139.19.75 (Mozilla/5.0 (X11; Linux i686; rv:21.0) Gecko/20100101 Firefox/21.0) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 May 2013 11:20:32 -0000 Fred Morcos gmail.com> writes: > .. > The improvement effect can be > noticed on large inputs. These algorithms will most probably perform quite > badly on small inputs. I think your concern has been addressed in review of various algos where base case identification helped to avoid overhead cost in small problem sizes relative to cache. http://erikdemaine.org/papers/BRICS2002/paper.pdf In light of available but not implemented better VMM algos, perhaps *BSD and Linux could eliminate or reduce the need for: - swap space - swapping out RAM even if there is no lack of it - overcommitment of memory (a bluff asking to be punished by OOM killer) - OOM killer Besides, they allow sloppy/dangerous programming. jb