On Fri, Dec 18, 2015 at 3:16 PM, Andy Lutomirski <l...@amacapital.net> wrote:
>
> Yes, I think. If I'm using protection keys to protect some critical
> data structure (important stuff in shared memory, important memory
> mapped files, pmem, etc), then I'll allocate a protection key and set
> PKRU to deny writes. The problem is that I really, really want writes
> denied except when explicitly enabled in narrow regions of code that
> use wrpkru to enable them, and I don't want an asynchronous signal
> delivered in those narrow regions of code or newly cloned threads to
> pick up the write-allow value. So I want baseline_pkru to have the
> deny writes entry.
Hmm. Ok, that does sound like a valid and interesting usage case. Fair enough.
Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
