Hannes Reinecke
d48d0d0892
Quite some drivers are using management commands internally. These commands typically use the same tag pool as regular SCSI commands. Tags for these management commands are set aside before allocating the block-mq tag bitmap for regular SCSI commands. The block layer already supports this via the reserved tag mechanism. Add a new field 'nr_reserved_cmds' to the SCSI host template to instruct the block layer to set aside a tag space for these management commands by using reserved tags. Exclude reserved commands from .can_queue because .can_queue is visible in sysfs. Change-Id: Ie18285c756bafe152a8ca17109469e4518366039 Signed-off-by: Hannes Reinecke <hare@suse.de> [ bvanassche: modified patch description ] Cc: John Garry <john.g.garry@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Bug: 408217416 Link: https://lore.kernel.org/linux-scsi/20250403211937.2225615-5-bvanassche@acm.org/ Signed-off-by: Bart Van Assche <bvanassche@google.com>