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Commit dcb8baec authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge
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xen/blkfront: cope with backend that fail empty BLKIF_OP_WRITE_BARRIER requests



Some(?) Xen block backends fail BLKIF_OP_WRITE_BARRIER requests, which
Linux uses as a cache flush operation.  In that case, disable use
of FLUSH.

Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Daniel Stodden <daniel.stodden@citrix.com>
parent be2f8373
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