On 6/16/19 8:03 PM, Ming Lei wrote:
Scsi MQ makes a large static allocation for the first scatter gather list chunk for the driver to use. This is a performance headache we'd like to fix by reducing the size of the allocation to a 2 element array. Doing this will break the current guarantee that any driver using SG_ALL doesn't need to use the scatterlist iterators and can get away with directly dereferencing the array. Thus we need to update all drivers to use the scatterlist iterators and remove direct indexing of the scatterlist array before reducing the initial scatterlist allocation size in SCSI.
For all patches in this series except 9/16 and 11/16, please add the following:
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
