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From: Andrew Lutomirski <luto@mit.edu>
Date: Mon, 23 May 2011 11:28:07 -0400
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Subject: Re: [PATCH v5 0/8] vDSO time changes for 2.6.40
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
        Andi Kleen <andi@firstfloor.org>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@amd64.org>
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On Mon, May 23, 2011 at 11:23 AM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Mon, May 23, 2011 at 6:31 AM, Andy Lutomirski <luto@mit.edu> wrote:
>> [Patch 8/8 is brand-new and optional.  If anyone objects to it,
>>  please just drop it for 2.6.40 and I'll fix it for 2.6.41.]
>
> Hmm. I would just put it into 7/8 immediately, and never have the
> stupid read-lock loop in the first place.
>
> Or I would just say "the time() system call just isn't that critical,
> let's not even bother".

I have no particular preference.  The only argument I can make is that
the change deletes code and it lets us tell the glibc people "not only
can you stop using a silly old interface but you can make your code
0.4ns faster."

--Andy