From: Marco Stornelli <marco.stornelli@coritel.it>
To: Ruksen INANIR <rukseninanir@gmail.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: increase lowmem value for ppc
Date: Thu, 17 Jul 2008 13:21:48 +0200 [thread overview]
Message-ID: <487F2B4C.7070409@coritel.it> (raw)
In-Reply-To: <487F297B.4070806@coritel.it>
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.
--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
marco.stornelli@coritel.it
+39 06 72582838
next prev parent reply other threads:[~2008-07-17 11:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-17 10:32 increase lowmem value for ppc Ruksen INANIR
2008-07-17 11:14 ` Marco Stornelli
2008-07-17 11:21 ` Marco Stornelli [this message]
2008-07-17 11:22 ` Ruksen INANIR
2008-07-17 11:35 ` Marco Stornelli
2008-07-17 11:51 ` Ruksen INANIR
2008-07-17 12:05 ` Marco Stornelli
[not found] <mailman.2286.1216296226.2883.linuxppc-embedded@ozlabs.org>
2008-07-17 20:07 ` Siva Prasad
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