From owner-svn-src-head@FreeBSD.ORG Wed Jan 27 08:26:17 2010 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 68BB21065672; Wed, 27 Jan 2010 08:26:17 +0000 (UTC) (envelope-from alexander@leidinger.net) Received: from mail.ebusiness-leidinger.de (mail.ebusiness-leidinger.de [217.11.53.44]) by mx1.freebsd.org (Postfix) with ESMTP id 03AFA8FC08; Wed, 27 Jan 2010 08:26:16 +0000 (UTC) Received: from outgoing.leidinger.net (pD9E2FFF7.dip.t-dialin.net [217.226.255.247]) by mail.ebusiness-leidinger.de (Postfix) with ESMTPSA id 428E884452C; Wed, 27 Jan 2010 09:26:11 +0100 (CET) Received: from webmail.leidinger.net (webmail.leidinger.net [192.168.1.102]) by outgoing.leidinger.net (Postfix) with ESMTP id A64761067DB; Wed, 27 Jan 2010 09:26:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=Leidinger.net; s=outgoing-alex; t=1264580767; bh=o72YkU78LjxmdhfLeTcRih/fVlrtRn1L7Yvua5Zo3bI=; h=Message-ID:Date:From:To:Cc:Subject:References:In-Reply-To: MIME-Version:Content-Type:Content-Transfer-Encoding; b=bnEYqR3tOOGyh5ix9YpIpLZ1TO+R/t0z00Ru0Q3tF1o3+cEPIXDoseANPzNZKf36R 5dzxvaXF6BUxoeY3sQk+1JM9WOPx+6upBzgUc/Np4dkEFEg3Nhdf2umH2Ez3Jw+ywY iE3evXX/7xLfEBGiX0BJdqbCPQcmJ8KoF5U+cpQ6cqJxXx1JkpTrn67TZJc5ZNvBw+ xxjDdez8jPxljCArXwDJPjVHoqq1k0Rd9cqcPYwJSVj7kIByDKsE5wQQqEb5qJeuJY Ls8ZEkbrneIdbEgh70gdON90O2RnWpzwaZAwTGx58UfOATaZDLgKVqx4/8qNgI1/o1 9x1q8w4aWl4FA== Received: (from www@localhost) by webmail.leidinger.net (8.14.3/8.13.8/Submit) id o0R8Q6jp081114; Wed, 27 Jan 2010 09:26:06 +0100 (CET) (envelope-from Alexander@Leidinger.net) Received: from pslux.cec.eu.int (pslux.cec.eu.int [158.169.9.14]) by webmail.leidinger.net (Horde Framework) with HTTP; Wed, 27 Jan 2010 09:26:06 +0100 Message-ID: <20100127092606.19093xuevmlx4xpc@webmail.leidinger.net> Date: Wed, 27 Jan 2010 09:26:06 +0100 From: Alexander Leidinger To: John Baldwin References: <201001231842.o0NIgSa5086957@svn.freebsd.org> <20100126141525.10365e5dzlk7jc4k@webmail.leidinger.net> <9bbcef731001260905u36436624rfcf466765eee1f6a@mail.gmail.com> <201001261507.21399.jhb@freebsd.org> In-Reply-To: <201001261507.21399.jhb@freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; DelSp="Yes"; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: 7bit User-Agent: Dynamic Internet Messaging Program (DIMP) H3 (1.1.4) X-EBL-MailScanner-Information: Please contact the ISP for more information X-EBL-MailScanner-ID: 428E884452C.E8C18 X-EBL-MailScanner: Found to be clean X-EBL-MailScanner-SpamCheck: not spam, spamhaus-ZEN, SpamAssassin (not cached, score=-1.286, required 6, autolearn=disabled, ALL_TRUSTED -1.44, DKIM_SIGNED 0.00, DKIM_VERIFIED -0.00, TW_SV 0.08, TW_ZF 0.08) X-EBL-MailScanner-From: alexander@leidinger.net X-EBL-MailScanner-Watermark: 1265185572.29599@ddIHPEbw9GiXkEDxTRwfWA X-EBL-Spam-Status: No Cc: Alan Cox , svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Ivan Voras Subject: Re: svn commit: r202894 - in head/sys/i386: i386 include X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jan 2010 08:26:17 -0000 Quoting John Baldwin (from Tue, 26 Jan 2010 15:07:21 -0500): > On Tuesday 26 January 2010 12:05:29 pm Ivan Voras wrote: >> 2010/1/26 Alexander Leidinger : >> > >> > Quoting John Baldwin (from Mon, 25 Jan 2010 07:57:49 >> > -0500): >> > >> >> On Saturday 23 January 2010 1:42:28 pm Alan Cox wrote: >> >>> >> >>> Author: alc >> >>> Date: Sat Jan 23 18:42:28 2010 >> >>> New Revision: 202894 >> >>> URL: http://svn.freebsd.org/changeset/base/202894 >> >>> >> >>> Log: >> >>> Handle a race between pmap_kextract() and pmap_promote_pde(). >> This race >> >>> is >> >>> known to cause a kernel crash in ZFS on i386 when superpage >> promotion is >> >>> enabled. >> >>> >> >>> Tested by: netchild >> >>> MFC after: 1 week >> >> >> >> Yay! Should we enable pg_ps by default on i386 now? >> > >> > Data point, the i386 system where I have superpages enabled is a p4 with >> > currently 11 jails active. Some webservers, squid, samba, bind, >> postfix and >> > a lot of portupgrades (during the last days, I'm updating a jail with a >> > desktop-setup inside). All jails are on ZFS. >> >> Do you have any method of comparing performance before-and-after? >> There was a thread on some of the mailing lists (stable@/current@?) >> about squid being the pessimal case for superpages. > > The thread did not say that superpages made squid slower, rather that due to > the way it forked to execute the log rotation binaries, some superpages were > demoted back to regular pages losing the gain of superpages for those pages. Additionally: - this is my server at home (limited amount of users accessing it) - I changed too much at once which may affect the performance (superpages, ATA_CAM, zfs-kernel-settings) Apart from that: I have no performance numbers for this machine. Bye, Alexander. -- Fresco's Discovery: If you knew what you were doing you'd probably be bored. http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137