On Mon, Nov 18, 2013 at 8:37 PM, H. Peter Anvin <h...@zytor.com> wrote:
>
> Do you have a preference:
>
> 1. Considering the 32-bit truncation incidental (take it or leave it);
> 2. Require the 32-bit truncation, or
> 3. Get rid of it completely?
I don't have a huge preference, but I hate the current situation (with
Fenghua's patch) where it's not consistent. One path uses just 32-bits
of the count (thanks to the "mov %edx,%ecx") while another path uses
64 bits.
One or the other, but not a mixture of both.
And only tangentially related to this: I do think that we could be
stricter about the count. Make it oops if the high bits are set,
rather than overwrite a lot of memory. So I would not be adverse to
limiting the count to 31 bits (or even less) explicitly, and thus
making the while 32-vs-64 bit issue moot.
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/
