From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.67) (envelope-from ) id 1IGF6W-0002uO-A6 for garchives@archives.gentoo.org; Wed, 01 Aug 2007 14:23:12 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.14.0/8.14.0) with SMTP id l71ELpxt014843; Wed, 1 Aug 2007 14:21:51 GMT Received: from rv-out-0910.google.com (rv-out-0910.google.com [209.85.198.191]) by robin.gentoo.org (8.14.0/8.14.0) with ESMTP id l71EHQFA009954 for ; Wed, 1 Aug 2007 14:17:27 GMT Received: by rv-out-0910.google.com with SMTP id c27so151475rvf for ; Wed, 01 Aug 2007 07:17:26 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=rxOhWq7r++pVfqtdwWebKZ6cX0D2B+zYHVM/Kb3M3R7DjiIVfHPTI5qcQZDxO6Tk0g9S0+d4O7bMnUJloe5JVlINHctEKSTMdBHXzSqammFZT26jtggaE/1dOVqfXc2r+Q0a9vbuEiIg/1rLZEgVBkJY4LN4m2fp2cDFEkB3Xrs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=hMK0lU68l4gdt+3haSyyyXCLaKTV/7CAqQDvF9wM7ocM+rSOOj6VFi2NzEKOSo8CUKh135DbgA+7sBNfV+dZGqjIjslAJoV8CWr/t1xjyj+4qI7+bFvXWqBL1uVwalse4blvkwOoB2az28l0zIf9tVAl2soJlSo0EZ+9BcaNrLY= Received: by 10.141.132.8 with SMTP id j8mr284630rvn.1185977846351; Wed, 01 Aug 2007 07:17:26 -0700 (PDT) Received: by 10.141.197.5 with HTTP; Wed, 1 Aug 2007 07:17:26 -0700 (PDT) Message-ID: Date: Wed, 1 Aug 2007 15:17:26 +0100 From: "Duane Griffin" Sender: duaneg@gmail.com To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Linux too damn slow if memory > 3GB In-Reply-To: <8a0c7af10707281628p61dac9f1x89aef31a6f2b71df@mail.gmail.com> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <8a0c7af10707281628p61dac9f1x89aef31a6f2b71df@mail.gmail.com> X-Google-Sender-Auth: 15f0ed8025ddc395 X-Archives-Salt: 672424e5-015c-4f2f-a0fb-984af4f7b970 X-Archives-Hash: 334eb2827ff9b17175ec38d33af5d942 On 29/07/07, Daniel van Ham Colchete wrote: > Hello everyone!!! > > May be somebody can shed some light here... I'm building a server here with > 4GB of RAM memory. The fact is, if I boot with mem=3072M everything goes as > fast as it should but I'm not using 1GB of memory. If I don't put the mem > option, Linux will see 4GB of memory available but it will be damn slow > (really). It sounds like a problem with a buggy BIOS not setting up your MTRR properly. This means linux ends up using ultra-slow memory for important stuff. The problem has been discussed quite a bit on LKML, see here, for example: http://marc.info/?l=linux-kernel&m=118072237228294 > Any lights would be very appreciated. Try upgrading to the latest BIOS version available for your motherboard. If that doesn't fix it you will have to tell linux not to use the affected memory. You can find out where that is by checking your dmesg and /proc/mtrr, as described in the message referenced above. Post the information here if you aren't sure. Cheers, Duane. -- "I never could learn to drink that blood and call it wine" - Bob Dylan -- gentoo-user@gentoo.org mailing list