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    SubjectRe: [PATCH 1/3] xen/blk[front|back]: Use the full FLUSH | FUA instead of just FLUSH.
    On Fri, Sep 09, 2011 at 02:30:59PM -0400, Konrad Rzeszutek Wilk wrote:
    > During a FLUSH we can pass sector number that we want to
    > have flushed - which is what FUA requests are.

    No, that is not the case.

    REQ_FLUSH without data -> pure flush
    REQ_FLUSH with data -> preflush plus write
    REQ_FUA -> write and ranged postflush



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