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
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