[PATCH 0/8] io-pgtable lock removal

[Will Deacon]

On Tue, Jul 04, 2017 at 06:45:17PM -0700, Ray Jui wrote:
> Hi Will/Robin,
> 
> Has anything functionally changed between PATCH v2 and v1? I'm seeing a
> very different L2 throughput with v2 (in general a lot worse with v2 vs.
> v1); however, I'm currently unable to reproduce the TLB sync timed out
> issue with v2 (without the patch from Will's email).
> 
> It could also be something else that has changed in my setup, but so far
> I have not yet been able to spot anything wrong in the setup.

There were fixes, and that initially involved a DSB that was found to be
expensive. The patches queued in -next should have that addressed, so please
use those (or my for-joerg/arm-smmu/updates branch).

Will