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SubjectRe: [PATCH 2/2] mm: page allocator: Do not drain per-cpu lists via IPI from page allocator context
On Wed, 2012-01-11 at 10:11 +0000, Mel Gorman wrote:
> At least one bug report has
> been seen on ppc64 against a 3.0 era kernel that looked like a bug
> receiving interrupts on a CPU being offlined.

Got details on that Mel? The preempt_disable() in on_each_cpu() should
serialize against the stop_machine() crap in unplug.

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