James Bottomley wrote:
Yes, I can buy the argument for filesystem I/Os. What about tapes which currently use the block queue and have internal home grown stuff to handle larger transfers ... how are they supposed to set the larger default sector size? Just modify the bare q->max_sectors?
Sorry for the late response. I have been doing userspace stuff and not keeping up with linux-scsi :(
For scsi tape and passthrough (any place we use REQ_TYPE_BLOCK_PC like with st or sg or block/scsi_ioctl or bsg), the block/bio/scatterlist building code ignores q->max_sectors and uses q->max_hw_sectors.
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