Yes, that's the case I was thinking of. sendfile() and tux are potential
triggers of this.
> If so, I don't see why Ed's trace BUGs at rmqueue first: It should bug at
> __free_pages_ok() PageLRU check.
Hmm, as we've discussed on irc, there are some other nasty implications of
the __free_pages code interacting with shrink_cache without this patch. I'm
not certain that explains it, but it could. Ed, have you seen this oops
again? What kind of load is the machine under?
-ben
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