On Mon, Nov 21, 2022 at 10:40:45PM +0100, Eric Farman wrote: > It was suggested [1] that we replace the old copy_from_iova() routine > (which pins a page, does a memcpy, and unpins the page) with the > newer vfio_dma_rw() interface. > > This has a modest improvement in the overall time spent through the > fsm_io_request() path, and simplifies some of the code to boot. > > [1] https://lore.kernel.org/r/20220706170553.GK693670@xxxxxxxxxx/ > > Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx> > Signed-off-by: Eric Farman <farman@xxxxxxxxxxxxx> > --- > drivers/s390/cio/vfio_ccw_cp.c | 56 +++------------------------------- > 1 file changed, 5 insertions(+), 51 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
