← previous next →
Pages: [1]

Author Topic: swap partition  (Read 2505 times)

ced

  • Full Member
  • ***
  • Posts: 225
    • View Profile
    • http://
swap partition
« on: May 12, 2004, 03:44:19 am »
sorry to bring up again a discussion about swap partition...

from this article --] http://hedera.linuxnews.pl/_news/2002/09/0..._long/1445.html

can we move the partition /home (which is /dev/mtdblock3) to a flash card (SD or CF) and make /dev/mtdblock3 a swap partition?

so finally on the SL5600 (don\'t know about the C-xxx):
  * ~25M for the system (root partition)
  * ~32M of RAM + ~32M of swap = 64M of memory
  * and whatever for the home partition
Logged
SL-5600, kernel 2.6.16 + GPE from .dev
Ethernet Socket LP-E
Viking 256M SD

DrWowe

  • Hero Member
  • *****
  • Posts: 696
    • View Profile
    • http://
swap partition
« Reply #1 on: May 12, 2004, 04:16:33 am »
It\'s a bad idea.  You\'re better off using the CF or SD slot for swap.  You can create a swap file on the card of 32 megs or whatever size you want.  At least the flash card can be replaced when it wears out quickly due to overuse...

Or best of all, use a microdrive.
Logged

tumnus

  • Hero Member
  • *****
  • Posts: 1176
    • View Profile
    • http://www.cpinkney.org.uk
swap partition
« Reply #2 on: May 12, 2004, 04:44:31 am »
Is NAND flash memory even supported by the swap filesystem? I didn\'t think it was and probably won\'t be because of the issue DrWowe raised. JFFS2 does write balancing so that no one area of flash gets worn out before another, but even if the swap filesystem did this, I imagine it would write so many times that it would quickly wear the flash out.

Besides which, writing to NAND flash is really slow.
Logged
# Search the Zaurus Howtos ## Search the Zaurus FAQs ## Find Z software at ELSI #
--------------------
UK SL5500 with Sharp ROM 3.13, SL5600 with Sharp ROM 1.32 - SuSE 9.0 Pro, Windows XP Home
Qualendar for Calendar and Todo
Socket Bluetooth CF Card (Rev F), Kingmax 512MB MMC Card, Palm Tungsten T Stylus,
Pretec CF->Smartmedia Adapter, Semsons Universal Battery Extender

Teletubbie

  • Sr. Member
  • ****
  • Posts: 252
    • View Profile
    • http://
swap partition
« Reply #3 on: May 12, 2004, 01:09:45 pm »
I heard this would destroy soonly  CF, SD or the intenal jffs2 Flash. Maybe you this according to previos discussions. But maybe newbees cant relocate past discussions and should be aware of installing swap.
Cheers,
Sam
Logged
SL-5500G
OZ 3.3.6-pre1
Opie 1.1.4

ced

  • Full Member
  • ***
  • Posts: 225
    • View Profile
    • http://
swap partition
« Reply #4 on: May 13, 2004, 05:08:55 am »
anyone has configured NBD? http://nbd.sourceforge.net/
if so give a shout...
Logged
SL-5600, kernel 2.6.16 + GPE from .dev
Ethernet Socket LP-E
Viking 256M SD

zbones

  • Sr. Member
  • ****
  • Posts: 459
    • View Profile
swap partition
« Reply #5 on: May 13, 2004, 05:12:49 pm »
Is this any better than putting a swap file on an nfs/samba mounted device?
Also\' it\'s probably not much good for a portable device, unless you have contstantt wifi access (not in the UK  )

Swap device present, move 20 meters,swap device go bye bye, zaurus crashes instantly  
Logged
Zaurus cl760, cacko QT rom. Zaurus sl5500 with TKCrom 1.0.
512mb Kingston cf card, 256mb Sandisk sd card, Lexar 256mb sd card.
Bluemonkey bluetooth card <-> Sony Ericsson k700i for gprs.
Buffalo WLI-CF-S11G wifi card. Haicom 303 mmf gps cf/seral card.

DrWowe

  • Hero Member
  • *****
  • Posts: 696
    • View Profile
    • http://
swap partition
« Reply #6 on: May 13, 2004, 05:17:08 pm »
Quote
Is this any better than putting a swap file on an nfs/samba mounted device?


NBD could be more efficient, because its a very simple protocol.  NFS/SMB would add considerable communication overhead.

Might work okay if the device is being used in a fixed location.
Logged
Pages: [1]
← previous next →