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2011-09-01
, 06:47
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Posts: 136 |
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Joined on Jul 2010
@ Greece
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#113
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that was my finding also. not a good idea to grab more than half available physical ram for swapz. you don't want to pass each and every call for ram allocation through the swap mechanism. I have such a low disksize for a frew days now and it works, no lags, no crashes, no wonders.
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2011-09-01
, 07:22
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Posts: 3,074 |
Thanked: 12,960 times |
Joined on Mar 2010
@ Sofia,Bulgaria
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#114
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Originally Posted by evan
Did you try with 96MB?
that was my finding also. not a good idea to grab more than half available physical ram for swapz. you don't want to pass each and every call for ram allocation through the swap mechanism. I have such a low disksize for a frew days now and it works, no lags, no crashes, no wonders.
And would you share your other settings:
where is your swap located at
/proc/sys/vm changes
io scheduler changes (if any)
what else?
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2011-09-01
, 07:39
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Posts: 136 |
Thanked: 115 times |
Joined on Jul 2010
@ Greece
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#115
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I tried with 96mb only for a while and while I did not see heavy lags, I noticed nokia maps to take too long to start. Swappiness to 30 and laptop mode to 0 as is default. Nothing else changed. No magic script nor magic carpets. Swap is the default p3 cause I can’t get bothered to repartition my sd card although since you say it’s the best bet for improved performance I will try it when I find the time.
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2011-09-01
, 13:20
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Posts: 5,028 |
Thanked: 8,613 times |
Joined on Mar 2011
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#116
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And:
Originally Posted by freemangordon
...seems to be impossible to fix, currently?
Notifications are working, but seems there are paths in the kernel swap subsystem allowing direct write over a page without first marking it free.
Seems like memory consumption should not be affected by that.
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2011-09-01
, 13:50
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Posts: 3,074 |
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Joined on Mar 2010
@ Sofia,Bulgaria
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#117
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Originally Posted by Estel
Should be posible, but I don't think we will gain anything but additional overhead. You can check upstream zram, they are not using notifications at all, does not seem to have much negative effect. The problem is that SW running on n900 needs lots of RAM and not having it (because it is used by compcache) leads to constant swapping (swap trash).
And:
...seems to be impossible to fix, currently?
Anyway there is definitely improvement from using compcahe, just not so much that was probably expected. Use disksize_kb in range 64MB to 96MB and you will see it.
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2011-09-01
, 16:25
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Posts: 5,028 |
Thanked: 8,613 times |
Joined on Mar 2011
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#118
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Thanks for all your effort - I've not had any "exaggerated" expectations, and it's already great thing that you've bring it to us. I think it's closest of what we can get, to actual higher RAM amount 
So, thanks for doing something, that no one else was able/interested to bring us.
So, thanks for doing something, that no one else was able/interested to bring us.
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N900's aluminum backcover / body replacement
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Camera cover MOD
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Measure battery's real capacity on-device
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Hardware's mods research is costly. To support my work, please consider donating. Thank You!
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2011-09-02
, 05:54
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Posts: 2,021 |
Thanked: 1,060 times |
Joined on Apr 2010
@ Hong Kong
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#119
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Friends, I tried swap on SD:
ramzswap (120504), mmcblk0p3, mmcblk1p2 (796472) with priority 1, 0, 0 and with your setting recommanded, but still sometimes the UI got some laggy.
Moreover, I made a script for bootup, only can swapon ramzswap and mmcblk0p3, mmcblk1p2 cant swapon at bootup
from added a more line here, http://talk.maemo.org/showpost.php?p...8&postcount=95
ramzswap (120504), mmcblk0p3, mmcblk1p2 (796472) with priority 1, 0, 0 and with your setting recommanded, but still sometimes the UI got some laggy.
Moreover, I made a script for bootup, only can swapon ramzswap and mmcblk0p3, mmcblk1p2 cant swapon at bootup
from added a more line here, http://talk.maemo.org/showpost.php?p...8&postcount=95
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2011-09-02
, 06:04
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Posts: 3,074 |
Thanked: 12,960 times |
Joined on Mar 2010
@ Sofia,Bulgaria
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#120
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Originally Posted by TMavica
Use only 64-96 MBs for ramzswap. And do not use mmcblk0p3, only SD card swap partition. And just to make sure put /sbin/ in front of swapon/swapoff commands
Friends, I tried swap on SD:
ramzswap (120504), mmcblk0p3, mmcblk1p2 (796472) with priority 1, 0, 0 and with your setting recommanded, but still sometimes the UI got some laggy.
Moreover, I made a script for bootup, only can swapon ramzswap and mmcblk0p3, mmcblk1p2 cant swapon at bootup
from added a more line here, http://talk.maemo.org/showpost.php?p...8&postcount=95
EDIT: and change first line of your script to "start on started rcS-late"
Last edited by freemangordon; 2011-09-02 at 06:09.
how to swap on sd card..cant find the wiki