[maemo-users] Does N770 have a REAL memory limit to 64MB?

From: Ryan Pavlik abiryan at ryand.net
Date: Mon Oct 29 23:38:33 EET 2007
Ádrian Lívio wrote:
> Ryan Pavlik escreveu:
>> ?drian L?vio wrote:
>>> Mike Yue escreveu:
>>>> When I booted the N770 from internal flash memory, I couldn't run 
>>>> as many apps as I booted from MMC card, so I thought the MMC card 
>>>> had already done the job extending the real memory.
>>>> But, seems I was wrong.
>>>> Now my N770 is booted from MMC card ext2 partition(around 450MB). 
>>>> From command "top", I can see only 64M memory there, and over 95% 
>>>> used:
>>>> Mem: 60672K used, 1552K free, 0K shrd, 872K buff, 27736K Cached.
>>>> From command "df", I can see the root filesystem(/dev/mmcblk0p2 is 
>>>> the MMC card partition ext2, now mounted to /)
>>>> Filesystem         1k-blocks         Used             Available     
>>>> Use%  Mounted on
>>>> /dev/mmcblk0p2     464324            158407           281945        
>>>> 36%   /
>>>> So, I am wondering if it is possible to extend the REAL memory to 
>>>> MMC card, and if someone has done that job?
>>>> BTW, as the article(howto_easily_boot_from_mmc_card) said, the N770 
>>>> should run much faster than booting from internal flash memory, but 
>>>> I don't see that difference. Did I do something wrong?
>>>> Thanks for your attentions, and appreciate for any replies.
>>>> Mike
>>> Look the table from 
>>> http://www.forum.nokia.com/main/platforms/maemo/index.html#featured
>>> The 770 haves 64M of RAM memory. The use of the mmc card expands the 
>>> memory avaliable to install programs (128M). Then using the MMC you 
>>> got more spaces to install application, but you yet have the same 
>>> memory to run programs.
>>> []s
>> This is not an accurate statement.  The MMC card offers additional 
>> file storage (it shows up in applications and the File manager).  
>> Additionally, you can enable "extend virtual memory" which offers a 
>> sort of "swap space" which lets you run more applications at once 
>> (extending the 64mb built in ram with a slower flash-backed "hard 
>> drive").  Using a standard 770, you cannot increase the amount of 
>> space to _install_ applications: this is limited to 128.
>> Booting from MMC (a rather complicated, advanced maneuver) lets you 
>> install as many applications as will fit on the MMC card you 
>> purchased - in this case, I believe the card will _not_ show up as 
>> "Removable Memory Card" in the file manager or applications, as it is 
>> essentially serving as the system's internal 'hard drive'-type device.
> Hi Ryan Pavlik,
> Then, is possible to enable both solutions, boot from mmc and use swap 
> in mmc?
No clue, sorry.  Haven't ever booted from MMC myself.  I'd imagine that 
if you had a data partition on your MMC in addition to the root/boot 
partition, you could create a swapfile there.

Ryan Pavlik
AbiWord Win32 Platform Maintainer, Art Lead: www.abisource.com
AbiWord Community Outreach Project: www.cleardefinition.com/oss/abi/blog/

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