Re: 2.6.27.8: OOM killer: [swapper: page allocation failure]

[Justin Piszcz]

On Mon, 15 Dec 2008, Dan Williams wrote:

> On Fri, Dec 12, 2008 at 5:14 AM, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote:
> > [44893.846532] swapper: page allocation failure. order:0, mode:0x20
> [..]
> > Raid optimizations used:
> >
> > # cat oraid.sh |grep -v ^#|grep .
> > . /etc/profile
> > echo "Optimizing RAID Arrays..."
> > cd /sys/block
> > DISKS=$(/bin/ls -1d sd[e-j])
> > echo "Setting read-ahead to 32 MiB for /dev/md0"
> > blockdev --setra 65536 /dev/md0
> > echo "Setting stripe_cache_size to 16 MiB for /dev/md0"
> > echo 16384 > /sys/block/md0/md/stripe_cache_size
>
> If you set the stripe_cache_size high enough you can strangle the
> system.  Do you really need 384MiB of raid cache?

The weird thing is, with md/RAID-5, I never had a problem.

Justin.

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