Messages in this thread | | | Date | Wed, 14 Jul 2004 06:10:26 +0200 | From | Andrea Arcangeli <> | Subject | Re: VM Problems in 2.6.7 (Too active OOM Killer) |
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On Tue, Jul 13, 2004 at 08:44:02PM -0700, Peter Zaitsev wrote: > The reason for me to disable swap both in 2.4 and 2.6 is - it really > hurts performance. In some cases performance can be 2-3 times slower > with swap file enabled. Using O_DIRECT and mlock() for buffers helps > but not completely.
in 2.4 you can disable swap just fine (with oom killer disabled). until I/somebody fix 2.6 you can workaround this problem while still avoiding to swap much by setting /proc/sys/vm/swappiness to 0 or similar to tell the VM "please don't swap" even if swap is enabled ;). That will still prevent the oom killer to kick in. The oom killer is forbidden to run as long as `free` tells you that >= 4k of swap are still available to the OS. There are no other fundamental vm problems left I'm aware of in latest 2.6 besides these no-swap and oom issues. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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