linux-kernel - Re: [PATCH 0/4] Add 32 bit VDSO time function support

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Message-ID: <52EA704D.2000809@zytor.com>
Date:	Thu, 30 Jan 2014 07:31:25 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	stefani@...bold.net, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
	mingo@...hat.com, ak@...ux.intel.com, aarcange@...hat.com,
	john.stultz@...aro.org, luto@...capital.net, xemul@...allels.com,
	gorcunov@...nvz.org, andriy.shevchenko@...ux.intel.com
CC:	Martin.Runge@...de-schwarz.com, Andreas.Brief@...de-schwarz.com
Subject: Re: [PATCH 0/4] Add 32 bit VDSO time function support

On 01/30/2014 02:49 AM, stefani@...bold.net wrote:
> The VDSO page for a 32 bit resided now on 0xffffc000, followed by the VVAR and
> HPET page.

Any reason to not move the vdso base page to the top, in order to avoid
breaking broken applications?  It seems a fairly innocuous shuffle...
probably little gain, but very little cost.

	-hpa


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