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mr_xzibit is offline mr_xzibit
2010-09-03 , 22:47
Posts: 220 | Thanked: 49 times | Joined on Aug 2010 @ england
#31
how do i edit with midnight commander? i can locate the rcS edit it but it wont save my settings?
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egoshin is offline egoshin
2010-09-03 , 23:27
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#32
Originally Posted by JaseP View Post
And since flash memory's faster than disk
That is wrong. Test it yourself - eMMC flash speed is around 19MByte/sec but most of modern hard disk have more than 50MBytes/sec. And some server disks have around 130MByte/sec.

However, the swapiness 100 is definitely wrong, at least with current kernel - it doesn't have a conditional swapiness which would stop swap ops in progress if there is no "not-enough-memory" condition and some urgent flash IO.
 
tomast is offline tomast
2010-09-03 , 23:34
Posts: 21 | Thanked: 28 times | Joined on Apr 2010 @ Sweden
#33
You must become root before starting mc. Install package 'rootsh', start xterminal, write
Code:
root
mc
But be careful, especially when editing rcS. It's easy to render your N900 unbootable.
 
egoshin is offline egoshin
2010-09-04 , 00:22
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#34
I highly recommend to anybody who wants to change rcS - instead of that just create a file /etc/event.d/somename with following lines:

Code:
description "my somename fix"
author "My Name"

console output

start on started rcS-late

script
       echo "30" > /proc/sys/vm/swappiness
end script
... and insert any another wished lines after "echo 30" and before "end script"

This would not corrupt your N900 in case of problem and it allows the next Nokia OTA upgrade.

You need to be root and run your favorite editor (see prev posts for know how to edit file).
Last edited by egoshin; 2010-09-14 at 01:17. Reason: Syntax clarified to help avoid common bugs for beginners
 

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toxaris is offline toxaris
2010-09-07 , 06:49
Posts: 424 | Thanked: 196 times | Joined on Mar 2010 @ Sweden
#35
Originally Posted by egoshin View Post
I highly recommend to anybody who wants to change rcS - instead of that just create a file /etc/event.d/somename with following lines:

Code:
# my somename fix

start on started rcS-late

script
       echo 30 > /proc/sys/vm/swappiness
end script
... and insert any another wished lines after "echo 30" and before "end script"

This would not corrupt your N900 in case of problem and it allows the next Nokia OTA upgrade.

You need to be root and run your favorite editor (see prev posts for know how to edit file).
Yea, good idea. thx
 
hassan_badredin is offline hassan_badredin
2010-09-07 , 14:53
Posts: 150 | Thanked: 16 times | Joined on Jun 2010
#36
how do i get this symbol in n900??

>
 
wmarone is offline wmarone
2010-09-07 , 14:58
Posts: 1,746 | Thanked: 2,100 times | Joined on Sep 2009
#37
Originally Posted by egoshin View Post
That is wrong. Test it yourself - eMMC flash speed is around 19MByte/sec but most of modern hard disk have more than 50MBytes/sec. And some server disks have around 130MByte/sec.
As I noted to you elsewhere, a hard disk can do 50MByte/s or better but only when streaming. As soon as you start pushing random pages on and off disk, doing small reads and writes, a hard disk can fall under 200KB/s while a decent SSD will maintain at least 1MByte/s or better.

Consider that writing a single 4K RAM page consists of 8 x 512B writes (with the only benefit being that -this- page will be contiguous) and if you're pushing off more than a few pages swap partition, you're going to be hurting.

The eMMC lacking moving parts should maintain throughput much better. If you're real curious, you could always throw IOMeter at it
 
sony123 is offline sony123
2010-09-07 , 18:33
Posts: 650 | Thanked: 619 times | Joined on Nov 2009
#38
FYI this is a good tutorial of Linux VM

http://www.redhat.com/magazine/001nov04/features/vm/
 

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geneven is offline geneven
2010-09-07 , 18:45
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#39
Originally Posted by hassan_badredin View Post
how do i get this symbol in n900??

>
You go to the manual and read the section titled "Enter a character not found from the keyboard."

To save you some time, here is what the manual says:

"Press and hold (the diagonal blue arrow) and then press the sym key."
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egoshin is offline egoshin
2010-09-07 , 19:09
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#40
Actually, flash devices are more suitable for streaming then random access - there is a serious logic behind that. Yes the random access in flash is faster for READ but write is another story and it is not very good for flash devices yet.

In any way, swap write is essentially a sequential operation. Kernel does a special logic behind this.
 
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