Excerpts from Andrea Arcangeli's message of 2011-01-17 00:11:35 -0500:

[ crashes under load ]

NOTE: with the last changes compaction is used for all order > 0 and
even from kswapd, so you will now be able to trigger bugs in
compaction or migration even with THP off. However I'm surprised that
you have issues with compaction...

I know I mentioned this in another email, but it is kind of buried in
other context.  I reproduced my crash with CONFIG_COMPACTION and
CONFIG_MIGRATION off.

-chris

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