On Tue, Feb 28, 2012 at 10:00:30PM +0800, Fengguang Wu wrote:

Try to avoid page reclaim waits when writing to ramfs/sysfs etc.

Maybe not a big deal...

This looks like a separate fix that would make sense standalone.  It's
not just the waits, there is not much of a point in skipping zones
during allocation based on the dirty usage which they'll never
contribute to.  Could you maybe pull this up front?

CC: Johannes Weiner <redacted>
Signed-off-by: Fengguang Wu <redacted>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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