linux-kernel - Re: [PATCH 3/3] x86, vdso32: handle 32 bit vDSO larger one page

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Date:	Thu, 13 Mar 2014 14:48:33 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Andy Lutomirski <luto@...capital.net>,
	Ingo Molnar <mingo@...hat.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Stefani Seibold <stefani@...bold.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andreas Brief <Andreas.Brief@...de-schwarz.com>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Martin Runge <Martin.Runge@...de-schwarz.com>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [PATCH 3/3] x86, vdso32: handle 32 bit vDSO larger one page

On Thu, Mar 13, 2014 at 2:10 PM, Andi Kleen <ak@...ux.intel.com> wrote:
>
> Doesn't cripple it in any way.
>
> Forcing it to int 0x80 does however.

No it doesn't.

It runs fine. No crippling.

If you are silly enough to run a eight-year-old distribution, and then
upgrade just the kernel, you'll run a bit slower. So what?

We care about it *working*. We don't care about optimal performance of
an old distribution. People can upgrade if they want.

              Linus
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