Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 3 Jun 2021 12:15:39 -0700 | Subject | Re: [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read |
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On Thu, Jun 3, 2021 at 12:12 PM Linus Torvalds <torvalds@linux-foundation.org> wrote: > > Yeah, if that's sufficient, then that original patch should just work as-is.
To clarify: it obviously needs the VM_xyz flags things, but the VM_SHARED check in do_anonymous_page() is fine, and the whole issue with VM_MAYWRITE is entirely moot.
MAP_PRIVATE works fine with zero pages even when writable - they get COW'ed properly, of course.
Linus
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