* [RFC PATCH] userfaultfd: add UFFDIO_TRY_COW
@ 2018-03-28 10:17 Mike Rapoport
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From: Mike Rapoport @ 2018-03-28 10:17 UTC (permalink / raw)
To: Andrea Arcangeli, Pavel Emelyanov; +Cc: linux-mm, linux-api
Hi,
This is an initial attempt to implement COW with userfaultfd.
It's not yet complete, but I'd like to get an early feedback to see I'm not
talking complete nonsense.
It was possible to extend UFFDIO_COPY with UFFDIO_COPY_MODE_COW, but I've
preferred to add the COW'ing of the pages as a new ioctl because otherwise
I would need to extend uffdio_copy structure to hold an additional
parameter.
--
Sincerely yours,
Mike.
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2018-03-28 10:17 [RFC PATCH] userfaultfd: add UFFDIO_TRY_COW Mike Rapoport
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