Re: [GIT PULL] x86 fixes for 2.6.30-rc8
From: Michael S. Zick
Date: Sat May 30 2009 - 08:13:38 EST
On Sat May 30 2009, Pavel Machek wrote:
> > --- a/Documentation/kernel-parameters.txt
> > +++ b/Documentation/kernel-parameters.txt
> > @@ -1535,6 +1535,10 @@ and is between 256 and 4096 characters. It is defined in the file
> > register save and restore. The kernel will only save
> > legacy floating-point registers on task switch.
> > + noxsave [BUGS=X86] Disables x86 extended register state save
> > + and restore using xsave. The kernel will fallback to
> > + enabling legacy floating-point and sse state.
> > +
> Does that mean apps using sse8 will see their registers corrupted if
> this option is used? Or are new registers sets always added in a way
> that kernel has to enable them first?
Has this change been tested on the processors that have independent ftp&sse
units, without the shared registers? Such as the VIA C7-M?
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