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

[Stefani Seibold]

Am Donnerstag, den 30.01.2014, 07:31 -0800 schrieb H. Peter Anvin:
> On 01/30/2014 02:49 AM, stefani@xxxxxxxxxxx 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
> 

The reason is that i get need than an additional VMA for HPET and VVAR. 

I seen no break of applications since the __FIXADDR_TOP is not on a fix
place. Lguest, XEN, OPLC and the reservetop Kernel Parameter will change
the VDSO Page Address.

- Stefani

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