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    SubjectRe: [PATCHSET block#for-2.6.36-post] block: replace barrier with sequenced flush
    On Mon, Aug 23, 2010 at 04:13:36PM +0200, Tejun Heo wrote:
    > Yeah, that sounds reasonable. blk_queue_flush() can be called anytime
    > without locking anyway, so it should be really easy to implement too.

    I don't think we can simply call blk_queue_flush - we must ensure to
    never set more bits than the device allows. We'll just need two
    sets of flags in the request queue, with the sysfs file checking that
    it never allows more flags than blk_queue_flush.

    I'll prepare a patch for this on top of the current series.

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