Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269517AbUIROTp (ORCPT ); Sat, 18 Sep 2004 10:19:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269508AbUIROTp (ORCPT ); Sat, 18 Sep 2004 10:19:45 -0400 Received: from merkurneu.hrz.uni-giessen.de ([134.176.2.3]:25521 "EHLO merkurneu.hrz.uni-giessen.de") by vger.kernel.org with ESMTP id S269517AbUIROTn (ORCPT ); Sat, 18 Sep 2004 10:19:43 -0400 Date: Sun, 19 Sep 2004 00:18:38 +1000 (EST) From: Sergei Haller X-X-Sender: gc1007@fb07-calculator.math.uni-giessen.de To: Andrew Walrond Subject: Re: lost memory on a 4GB amd64 In-Reply-To: Message-Id: References: <200409161528.19409.andrew@walrond.org> <200409161619.28742.andrew@walrond.org> Organization: University of Giessen * Germany MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-HRZ-JLUG-MailScanner-Information: Passed JLUG virus check X-HRZ-JLUG-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1753 Lines: 48 On Fri, 17 Sep 2004, Sergei Haller (SH) wrote: SH> AW> No - thats what I use. Do you have MTRR support enabled? SH> SH> yes. SH> SH> AW> I'll send you my .config file; Perhaps you could try that. SH> SH> I just had a look at it. tomorrow morning I'll try out some of the SH> options. I tried out many configurations of the kernel config, nothing helped. now I switched off SMP and it runs stable! So what am I to do about it? that's the summary: * if the memory is configured in one chunk (0-4gb) then the SMP kernel works, but I only have about 3.4 gb main memory. (I know why) * if the memory configuration is as follows: the first 3gb ar at the normal address range, the fourth gb is at the address range 4-5gb. then all 4gb are available (not quite -- a few mb ere missing, but thats ok) and - the SMP kernel panics as soon as I start X or allocate about 1.6gb of memory (maybe less would trigger that as well, that was the only test I ran) ahh, kernel compillation runs fine. - the non-SMP kernel runs stable. - memtest86 runs fine all kernels I mention are 2.6.8.1 vanilla. What do you think? Is there anything I can do? Sergei -- -------------------------------------------------------------------- -?) eMail: Sergei.Haller@math.uni-giessen.de /\\ -------------------------------------------------------------------- _\_V Be careful of reading health books, you might die of a misprint. -- Mark Twain - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/