Matthew Wilcox wrote: > On Tue, Sep 26, 2006 at 10:39:30AM -0700, Andrew Morton wrote: >> - Should it have been done at the block layer rather than at the scsi layer? > > This was already mentioned when he sent it to linux-scsi a few days ago. > There are scsi commands which bypass the block layer, such as SG_IO, and I do not think any command completely bypasses the block layer now. SG_IO, tape, sd and scanning insertion go through blk_execute_rq_nowait for insertion. For completion they go through blk_complete_request + end_that_request_first/last in the normal path and blk_complete_request + blk_requeue_request in the retry path. > block layer stats can make an extremely busy disc look not busy. > - > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
