Am 04.10.21 um 15:27 schrieb Jason Gunthorpe:
On Mon, Oct 04, 2021 at 03:22:22PM +0200, Christian König wrote:That use case is completely unrelated to GUP and when this doesn't work we have quite a problem.My read is that unmap_mapping_range() guarentees the physical TLB hardware is serialized across all CPUs upon return.
Thanks, that's what I wanted to make sure. Christian.
It also guarentees GUP slow is serialized due to the page table spinlocks. Jason
