oom kill oddness.

[Dave Jones <davej@redhat.com>]

So I have two boxes that are very similar.
Both have 2GB of RAM & 1GB of swap space.
One has a 2.8GHz CPU, the other a 2.93GHz CPU, both dualcore.

The slower box survives a 'make -j bzImage' of a 2.6.18 kernel tree
without incident. (Although it takes ~4 minutes longer than a -j2)

The faster box goes absolutely nuts, oomkilling everything in sight,
until eventually after about 10 minutes, the box locks up dead,
and won't even respond to pings.

Oh, the only other difference - the slower box has 1 disk, whereas the
faster box has two in RAID0.   I'm not surprised that stuff is getting
oom-killed given the pathological scenario, but the fact that the
box never recovered at all is a little odd.  Does md lack some means
of dealing with low memory scenarios ?

	Dave