Messages in this thread | | | Date | Wed, 26 Jan 2022 16:12:18 +0200 | From | Mike Rapoport <> | Subject | Re: [RFC PATCH 0/6] Add support for shared PTEs across processes |
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On Wed, Jan 26, 2022 at 01:38:49PM +0000, Matthew Wilcox wrote: > On Wed, Jan 26, 2022 at 11:16:42AM +0100, David Hildenbrand wrote: > > A while ago I talked with Peter about an extended uffd (here: WP) > > mechanism that would work on fds instead of the process address space. > > As far as I can tell, uffd is a grotesque hack that exists to work around > the poor choice to use anonymous memory instead of file-backed memory > in kvm. Every time I see somebody mention it, I feel pain.
How file-backed memory would have helped for the major use-case of uffd which is post-copy migration?
-- Sincerely yours, Mike.
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