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2012-12-20
, 23:27
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Posts: 262 |
Thanked: 315 times |
Joined on Jun 2010
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#122
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Can anyone confirm that larger swap partitions > 1 GB? 2 GB? actually have a performance benefit that compensates for the loss of MMC space?
Edit: I mean, does it provide a noticeable increase in the length of time between needing to defrag swap?
Last edited by Xagoln; 2012-12-21 at 00:33.
Edit: I mean, does it provide a noticeable increase in the length of time between needing to defrag swap?
Last edited by Xagoln; 2012-12-21 at 00:33.
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2012-12-21
, 08:58
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Posts: 669 |
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Joined on May 2010
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#123
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yes it does - i moved to 1.5GB and there is a need for much less cycles
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2013-01-03
, 00:44
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Posts: 262 |
Thanked: 315 times |
Joined on Jun 2010
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#124
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Thanks! Just by coincidence, I made the swap partitions on both of my N900s 1.5 GB each before receiving your reply 
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2013-02-07
, 05:56
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Posts: 97 |
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Joined on Jun 2010
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#125
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There is a lot of useful info in this thread, I read through most of it but still unclear about the best solution for enabling swap on microsd with fallback to emmc when it is not available at boot time. Will using both giving higher priority to microsd do the trick? My main concern is if I run swap on microsd xclusively and it dies or somehow is unavailable the device won't boot making impossible to take a corrective action.
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2013-02-07
, 08:46
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Posts: 2,102 |
Thanked: 1,937 times |
Joined on Sep 2008
@ Berlin, Germany
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#126
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The simplest setup for me is to have swap on an external microSD card, which i never take out. If it dies, i would just format another card to have a temporary swap on the partition i assigned in /etc/event.d/rcS-late.
For more complex setup, you could search for ereswap application http://talk.maemo.org/showthread.php...hlight=ereswap
For more complex setup, you could search for ereswap application http://talk.maemo.org/showthread.php...hlight=ereswap
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2013-02-07
, 13:14
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Joined on Apr 2010
@ UK
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#127
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Originally Posted by Val Demar
Quick reply in lunch break...
My main concern is if I run swap on microsd xclusively and it dies or somehow is unavailable the device won't boot making impossible to take a corrective action.
This is incorrect if you setup the correct things at boot time, which you have to do anyway.
Ereswap modifies rcs-late to force swap to sd (if available).
FlopSwap has an optional checkbox this adds/removes a file in event.d, (IMO better than modifing rcs-late) this again pushes swap to sd at boot if available.
Both programs fallback to device swap if not available.
For more information lookup...
Flopswap, Ereswap, Swap on micro SD, The perfect N900 setup pages at wiki.maemo.org
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2013-02-07
, 13:53
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Posts: 1,163 |
Thanked: 1,873 times |
Joined on Feb 2011
@ The Netherlands
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#128
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Originally Posted by peterleinchen
Seems I never responded to this one... You seem to manually swap it? Or have you written a script to automatically swap when threshold is reached? That way it wouldn't
@mr_pingu
Why do you do it every night?
I do it as my swap reaches (configurable) threshold of swap size. So I just swap when needed, start swap action with nice 19 and it lags abit, but it is fully okay/respondable (OK, you should not try to open multiple browser windows at that time, swapping swap space takes a few minutes ...).
The way I set this up, you never have to bother to swap manually, all will be done at night when I am sleeping. Also you (Atleast I do) never reach the threshold in 1 day so your phone is responsive, even after longer uptime
Said short: Set it up once, never bother anymore, it just works. That's why I prefer ereswap over FlopSwap.. Besides I dont have 3 swap partitions. However the way FlopSwap goes, is cleaner than Ereswap's way...
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N900 loaded with:
CSSU-T (Thumb)
720p recording,
Pierogi, Lanterne, Cooktimer, Frogatto
N9 16GB loaded with:
Kernel-Plus
--
[TCPdump & libpcap | ngrep]
--
donate
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2013-02-07
, 15:18
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Posts: 5,028 |
Thanked: 8,613 times |
Joined on Mar 2011
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#129
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It's true, that adding separate script on /etc/event.d/ is "cleaner", in a way that it have less chances or messing something up (not that I've heard about ereswap breaking anyone's rcS-late, ever, but there are always chances), or is just easier for manual managing. It's generally perceived, that touching default, boot-critical scripts - like rcS-late - is less "clean" way of doing things, and I absolutely agree with this.
Hoever, without modifying rcS_late, we have situation, where one script enables regular swap on eMMC, and another one disables it, just a moment later. It makes booting a little longer due to unnecessary operation being performed (although, in practice, it's hardly-to-non noticeable), but most importantly, just don't match my aesthetic, and can create problems, if one decide to go without any eMMC swap, at all.
That's why I've decided to go with the way of sed-modifying rcS-late, which was paincfully more hard to write, than just adding another script to /etc/event.d/, especially, that they way sed command was written, tries to be compatible with modified rcS-late's, too (unless the very swap lines vere touched, but in that case, one wouldn't need ereswap, probably).
After all, we have major respected packages touching boot-critical script - including things from CSSU - so why should we restrain ourselves
/Estel
Hoever, without modifying rcS_late, we have situation, where one script enables regular swap on eMMC, and another one disables it, just a moment later. It makes booting a little longer due to unnecessary operation being performed (although, in practice, it's hardly-to-non noticeable), but most importantly, just don't match my aesthetic, and can create problems, if one decide to go without any eMMC swap, at all.
That's why I've decided to go with the way of sed-modifying rcS-late, which was paincfully more hard to write, than just adding another script to /etc/event.d/, especially, that they way sed command was written, tries to be compatible with modified rcS-late's, too (unless the very swap lines vere touched, but in that case, one wouldn't need ereswap, probably).
After all, we have major respected packages touching boot-critical script - including things from CSSU - so why should we restrain ourselves
/Estel
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N900's aluminum backcover / body replacement
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2013-02-07
, 17:07
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Posts: 2,292 |
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Joined on Apr 2010
@ UK
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#130
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Originally Posted by mr_pingu
FlopSwap can be intrgated into cron/alarmd to run on a schedule if required. It's covered in the wiki.
Said short: Set it up once, never bother anymore, it just works. That's why I prefer ereswap over FlopSwap.. Besides I dont have 3 swap partitions. However the way FlopSwap goes, is cleaner than Ereswap's way...
I prefer to run everything on the card to reduce flash wear as I have said before.
While I agree FlopSwap is more restrictive in some ways (swap locations), it is designed to install and remove cleanly with no residue like applications IMO should.
This also makes it more user friendly hence the GUI, not a command tool like ereswap. Many beginners can utilise swap on SD with minimal knowledge using FlopSwap.
This is why I made FlopSwap instead of a GUI for ereswap.
Originally Posted by Estel
Agreed hence my design.
It's true, that adding separate script on /etc/event.d/ is "cleaner", in a way that it have less chances or messing something up
Originally Posted by Estel
Change in boottime is milliseconds.
Hoever, without modifying rcS_late, we have situation, where one script enables regular swap on eMMC, and another one disables it, just a moment later. It makes booting a little longer due to unnecessary operation being performed (although, in practice, it's hardly-to-non noticeable), but most importantly, just don't match my aesthetic, and can create problems, if one decide to go without any eMMC swap, at all.
FlopSwap is not designed to work with no device SD.
The device SD can be swapped to, so the back cover can be removed. Not everyone has modifed the magnet on the back cover.
Originally Posted by Estel
This is were modifing rcs-late can cause problems, and would cause a boot loop if rcs-late fails.
That's why I've decided to go with the way of sed-modifying rcS-late, which was paincfully more hard to write, than just adding another script to /etc/event.d/, especially, that they way sed command was written, tries to be compatible with modified rcS-late's, too (unless the very swap lines vere touched, but in that case, one wouldn't need ereswap, probably).
If the extra event.d file fails it would be ignored and booting should continue on device swap.
Originally Posted by Estel
CSSU fair enough, these are"system" updates, but IMO applications shouldn't just start modifing root and adding files everywhere. This is how root starts to get full of unremovable rubbish, for people that have NFC.
After all, we have major respected packages touching boot-critical script - including things from CSSU - so why should we restrain ourselves
At the end of the day it's nice to have options.
Both do the same thing and both have there place.
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Why do you do it every night?
I do it as my swap reaches (configurable) threshold of swap size. So I just swap when needed, start swap action with nice 19 and it lags abit, but it is fully okay/respondable (OK, you should not try to open multiple browser windows at that time, swapping swap space takes a few minutes ...).
SIM-Switcher, automated SIM switching with a Double (Dual) SIM adapter
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Last edited by peterleinchen; 2012-11-23 at 13:13.