Lines Matching refs:REQ_FLUSH

23 The REQ_FLUSH flag can be OR ed into the r/w flags of a bio submitted from
27 storage before the flagged bio starts. In addition the REQ_FLUSH flag can be
44 Filesystems can simply set the REQ_FLUSH and REQ_FUA bits and do not have to
46 the Forced Unit Access is implemented.  The REQ_FLUSH and REQ_FUA flags
53 These drivers will always see the REQ_FLUSH and REQ_FUA bits as they sit
56 to be implemented for bios with the REQ_FLUSH bit set.  For real device
57 drivers that do not have a volatile cache the REQ_FLUSH and REQ_FUA bits
58 on non-empty bios can simply be ignored, and REQ_FLUSH requests without
68 support required, the block layer completes empty REQ_FLUSH requests before
69 entering the driver and strips off the REQ_FLUSH and REQ_FUA bits from
74 	blk_queue_flush(sdkp->disk->queue, REQ_FLUSH);
76 and handle empty REQ_FLUSH requests in its prep_fn/request_fn.  Note that
77 REQ_FLUSH requests with a payload are automatically turned into a sequence
78 of an empty REQ_FLUSH request followed by the actual write by the block
82 	blk_queue_flush(sdkp->disk->queue, REQ_FLUSH | REQ_FUA);
86 layer turns it into an empty REQ_FLUSH request after the actual write.