On 17.02.21 21:28, Mike Christie wrote:

target_core_iblock is plugging and unplugging on every command and this
is causing perf issues for drivers that prefer batched cmds. With the
last patches we can now take multiple cmds from a fabric driver queue
and then pass them down the backend drivers in a batch. This patch adds
this support by adding 2 callouts to the backend for plugging and
unplugging the device. The next 2 patches add support for iblock and
tcmu device plugging.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
  drivers/target/target_core_transport.c | 43 +++++++++++++++++++++++++-
  include/target/target_core_backend.h   |  2 ++
  include/target/target_core_base.h      |  4 +++
  3 files changed, 48 insertions(+), 1 deletion(-)

Looks good.

Reviewed-by: Bodo Stroesser <bostroesser@gmail.com>