Messages in this thread | | | Date | Tue, 21 Dec 2021 15:07:06 -0400 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v1 06/11] mm: support GUP-triggered unsharing via FAULT_FLAG_UNSHARE (!hugetlb) |
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On Tue, Dec 21, 2021 at 06:40:30PM +0100, David Hildenbrand wrote:
> 2) is certainly the cherry on top. But it just means that R/O pins don't > have to be the weird kid. And yes, achieving 2) would require > FAULT_FLAG_EXCLUSIVE / FAULT_FLAG_UNSHARED, but it would really 99% do > what existing COW logic does, just bypass the "map writable" and > "trigger write fault" semantics.
I still don't agree with this - when you come to patches can you have this work at the end and under a good cover letter? Maybe it will make more sense then.
Thanks, Jason
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