How do I set swappiness with 3.0 kernel ?
jeffreyC
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Joined: 05 Nov 2010
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Swappiness set to 0
425 mb RAM in use
14 mb swap in use

With 2.6.39 series kernels there would be zero swap in use
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damentz
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Joined: 09 Sep 2008
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Well, the CK patches reset swappiness to 0. You can always use a sysctl entry to force a value larger than 0, even set it to 60 as a default value.

I'm thinking, though, that I should just remove that specific patch from Con. There's been many changes to memory management over the past few kernel releases that could make a value of 0 in swappiness more devastating than a positive value.

EDIT: This isn't too big of a change so I only made the change to the zen-kernel sources. The next time I push out a new package you'll see the change and you can remove your sysctl entry if you added one.
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jeffreyC
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Why I was asking is that it seems that it is ignoring the setting of 0 and using swap anyway.
I would rather it did not start using swap when only 10-15 % of RAM is in use, which it is now.
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damentz
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If you don't want to use swap, simply don't mount the swap partition. I think at a level of 0, the kernel will still use it according to the algorithms that decide when it's appropriate to move pages.
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jeffreyC
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I have tried different numbers in /proc/sys/vm/swappiness with the Liquorix 3.0 kernels and they are ignored.

I installed a Debian 3.0 kernel and /proc/sys/vm/swappiness is overwritten to 60 at every reboot, from 0 or 10 or anything.

Somewhere there must be a master setting for this but I do not know where.
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jeffreyC
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Joined: 05 Nov 2010
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Doing a Google search found a result for a zero swappiness patch in kernel.org, but they are down for maintenance
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