On 5/20/21 20:01, Damien Le Moal wrote: > Introduce the BIO flag BIO_ZONE_WRITE_LOCKED to indicate that a BIO owns > the write lock of the zone it is targeting. This is the counterpart of > the struct request flag RQF_ZONE_WRITE_LOCKED. > > This new BIO flag is reserved for now for zone write locking control > for device mapper targets exposing a zoned block device. Since in this > case, the lock flag must not be propagated to the struct request that > will be used to process the BIO, a BIO private flag is used rather than > changing the RQF_ZONE_WRITE_LOCKED request flag into a common REQ_XXX > flag that could be used for both BIO and request. This avoids conflicts > down the stack with the block IO scheduler zone write locking > (in mq-deadline). > > Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Reviewed-by: Hannes Reinecke <hare@xxxxxxx> > --- Looks good. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
