Re: [PATCH 12/29] x86, tsx: Add a per thread transaction disable count

[Linus Torvalds]

On Sat, Mar 23, 2013 at 8:52 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
>
> Really? Let's see:

Your test seems to assume that a single bit is sufficient, which
sounds unlikely. If you have any kind of nesting going on, you need
more than one bit. Then add/sub isn't a single "xor" of a bit any
more.

That said, making it just a byte sounds more than enough. How deep
would anybody want to nest it? Do we care?

                   Linus
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