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Re: [PATCH 02/23] x86, kaiser: do not set _PAGE_USER for init_mm p ...

Linus Torvalds writes: (Summary) wrote:

[...]

We'd have to force NONE, and Linus won't like it.
Oh, I think it's fine for the kaiser case.
Oh, I think it's fine for the kaiser case.
I am not convinced anybody will actually use it, but if you do use it, I suspect "the legacy vsyscall page no longer works" is the least of your worries.
your worries.
That said, I think you can keep emulation, and just make it unreadable. So we have four cases: - native
- read-only emulation
- unreadable emulation
- none
- none
and kaiser triggering that unreadable case sounds like the option least likely to cause trouble.

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