[PATCH V4 00/16] use sg helper to operate scatterlist

Bart Van Assche bvanassche at acm.org
Mon Jun 17 23:52:25 UTC 2019


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 at acm.org>


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