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SubjectRe: [dm-devel] Re: Write barriers on MD RAID1
On Wed, Jun 24, 2009 at 01:43:35PM +1000, Neil Brown wrote:
> Since this test was added, barriers have not worked on md, and (I
> think) dm and similar devices that don't use __make_request and so
> don't bother to set next_ordered.

In dm, we added this:

+ blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN, NULL);

Alasdair



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