Re: Order 0 page allocation failure under heavy I/O load

Claudio Martins
2008-10-27T05:54:24Z

On Sunday 26 October 2008, Dave Chinner wrote:

> The host will hang for tens of seconds at a time with both CPU cores
> pegged at 100%, and eventually I get this in dmesg:
>
> [1304740.261506] linux: page allocation failure. order:0, mode:0x10000
> [1304740.261516] Pid: 10705, comm: linux Tainted: P 2.6.26-1-amd64

Hello,

Have you tried to increase vm.min_free_kbytes to something higher, that is
>=30000?

I think I have hit something similar on a box running nbd-server to export a
3 SATA disk raid0 block device over Gigabit Ethernet.
Increasing min_free_kbytes got rid of the messages for me... Though the load
on your system is much higher than on mine.

Regards

Cláudio