Dropping to untagged mode when ramping down a queue due to QUEUE FULL events has two problems:
- nothing in the midlayer or drivers ever moves back to tagged mode during queue ramp up. - cmd_per_lun isn't the untagged queue depth for many modern drivers that can handle multiple untagged commands, and this is the only place in the midlayer assuming that. Signed-off-by: Christoph Hellwig <[email protected]> --- drivers/scsi/scsi.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 72282ae..6b0d524 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -820,12 +820,6 @@ int scsi_track_queue_full(struct scsi_device *sdev, int depth) if (sdev->last_queue_full_count <= 10) return 0; - if (sdev->last_queue_full_depth < 8) { - /* Drop back to untagged */ - scsi_set_tag_type(sdev, 0); - scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun); - return -1; - } return scsi_change_queue_depth(sdev, depth); } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
