From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.171]) by ozlabs.org (Postfix) with ESMTP id 1AA6CDE47E for ; Thu, 17 Jul 2008 21:22:42 +1000 (EST) Received: by ug-out-1314.google.com with SMTP id k3so608457ugf.0 for ; Thu, 17 Jul 2008 04:22:41 -0700 (PDT) Message-ID: <487F2B7D.6080109@gmail.com> Date: Thu, 17 Jul 2008 14:22:37 +0300 From: Ruksen INANIR MIME-Version: 1.0 To: Marco Stornelli , linuxppc-embedded@ozlabs.org Subject: Re: increase lowmem value for ppc References: <487F1FD2.7090909@gmail.com> <487F297B.4070806@coritel.it> <487F2B4C.7070409@coritel.it> In-Reply-To: <487F2B4C.7070409@coritel.it> Content-Type: text/plain; charset=ISO-8859-1; format=flowed List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Is there any side effects of changing the address splitting? What should i change for 2G/2G splitting? should i shift the kernel start? Thanks Marco Stornelli wrote: > Marco Stornelli ha scritto: >> Ruksen INANIR ha scritto: >>> >>> Is there a way to increase the lowmem value for ppc. The MAX_LOW_MEM >>> is defined as max 768 MB. But a value around 1.5 G works with no >>> problem. But when i try to increase this value to 1520 or more, >>> kernel complaints about no space for memory allocation when loading >>> kernel modules. >>> I do not want to use HIGHMEM config. What is the max lowmem value >>> for a ppc system? What other setting are needed to use 1520 MB (or >>> more) as lowmem . >>> The ppc card has 2G on board memory. 2.4.22 kernel is used. >>> >>> Thanks >>> _______________________________________________ >>> Linuxppc-embedded mailing list >>> Linuxppc-embedded@ozlabs.org >>> https://ozlabs.org/mailman/listinfo/linuxppc-embedded >>> >> With 32-bit arch you may not use more than 1GB to map the memory >> (minus some space for some kernel operation). The value of 768MB was >> not there by chance. >> > Only an additional comment: I meant with the address splitting 3G/1G. > To map more than 1GB, you have to change the splitting 2G/2G for example. >