On Fri, Sep 09, 2011 at 02:15:50PM +0100, Mel Gorman wrote:

I confess I haven't investigated this direction at
all yet.  Is it correct that your previous objection was
http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-10/msg00455.html
and the direct-IO patchset you were thinking of was
http://copilotco.com/mail-archives/linux-kernel.2009/msg87176.html ?

Yes.

If so, are you suggesting that instead of swap_readpage and
swap_writepage I look into what is required for swap to use ->readpage
method and ->direct_IO aops?

The equivalent of ->direct_IO should be used for both reads and writes.

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