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Date: Thu, 23 Jun 2016 19:10:37 +0200
From: Oleg Nesterov <>
To: Andy Lutomirski <>
Cc: Linus Torvalds <>,
        Andy Lutomirski <>,
        the arch/x86 maintainers <>,
        Linux Kernel Mailing List <>,
        "" <>,
        Borislav Petkov <>, Nadav Amit <>,
        Kees Cook <>, Brian Gerst <>,
        "" <>,
        Josh Poimboeuf <>, Jann Horn <>,
        Heiko Carstens <>
Subject: Re: [PATCH v3 00/13] Virtually mapped stacks with guard pages (x86,

On 06/23, Andy Lutomirski wrote:
> That sounds a bit more fragile than I'm really comfortable with,
> although it'll at least oops reliably if we get it wrong.
> But I'm planning on moving ti->flags (and the rest of thread_info,
> either piecemeal or as a unit) into task_struct on architectures that
> opt in,

I agree, this looks better. probably it should not be that hard to fix
GET_THREAD_INFO/etc, but you know this much better than me.


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