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[Xen-devel] blkfront and flush

Now that no-data barriers are supported/supportable, does it make sense to have 
blkfront call blk_queue_issue_flush_fn to register a flush method, which would 
use a no-data barrier request?

Is there any reason why this shouldn't work?

We have code which instead of using a  bio barrier, calls blkdev_issue_flush() 
in the linux guest, which returns -EOPNOTSUPP because that support has never 
been in blkfront.

- Bruce Rogers

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